diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1987358d..f516487f 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -72,7 +72,6 @@ filename: learnruby-epo.ruby
 contributors:
     - ["Doktor Esperanto", "http://example.com/"]
     - ["Someone else", "http://someoneelseswebsite.com/"]
-lang: ep-ep
 *--
 ```
 
diff --git a/ar/html.md b/ar/html.md
index 4bd09844..d170de91 100644
--- a/ar/html.md
+++ b/ar/html.md
@@ -1,6 +1,5 @@
 ---
 language: HTML
-lang: ar-ar
 filename: learnhtml-tf.txt
 contributors:
     - ["Christophe THOMAS", "https://github.com/WinChris"]
diff --git a/ar/python.md b/ar/python.md
index 870d17a9..cae2ae0c 100644
--- a/ar/python.md
+++ b/ar/python.md
@@ -10,7 +10,6 @@ contributors:
     - ["Roberto Fernandez Diaz", "https://github.com/robertofd1995"]
 translators:
     - ["Ahmad Hegazy", "https://github.com/ahegazy"]
-lang: ar-ar
 filename: learnpython-ar.py
 ---
 
diff --git a/ar/sql.md b/ar/sql.md
index 53817787..2df23a88 100644
--- a/ar/sql.md
+++ b/ar/sql.md
@@ -5,7 +5,6 @@ contributors:
   - ["Bob DuCharme", "http://bobdc.com/"]
 translators:
     - ["Ahmed Omar Eissa", "https://twitter.com/AhmedOmarEissa"]
-lang: ar-ar
 ---
 <div dir="rtl">
 
diff --git a/be/python.md b/be/python.md
index 15460aa7..6476e495 100644
--- a/be/python.md
+++ b/be/python.md
@@ -14,7 +14,6 @@ contributors:
 translators:
     - ["lucii7vel", "https://github.com/lucii7vel"]
 filename: learnpython-by.py
-lang: be-by
 ---
 Python быў створаны Гвіда ван Росумам у пачатку 90-х. Цяпер гэта адна з 
 самыя папулярных моў праграмавання. Я закахаўся ў Python за яго 
diff --git a/bg/logtalk.md b/bg/logtalk.md
index e788b17d..6129c466 100644
--- a/bg/logtalk.md
+++ b/bg/logtalk.md
@@ -5,7 +5,6 @@ contributors:
     - ["Paulo Moura", "http://github.com/pmoura"]
 translators:
     - ["vsraptor", "https://github.com/vsraptor"]
-lang: bg-bg
 
 ---
 
diff --git a/bg/perl.md b/bg/perl.md
index a75a68db..9a4d0ed9 100644
--- a/bg/perl.md
+++ b/bg/perl.md
@@ -7,7 +7,6 @@ contributors:
     - ["Dan Book", "http://github.com/Grinnz"]
 translators:
     - ["Красимир Беров", "https://github.com/kberov"]
-lang: bg-bg
 ---
 
 Perl е изключително мощен език за програмиране с широка област на приложение
diff --git a/ca/asciidoc.md b/ca/asciidoc.md
index b7bcdf94..5db078bc 100644
--- a/ca/asciidoc.md
+++ b/ca/asciidoc.md
@@ -4,7 +4,6 @@ contributors:
     - ["Ryan Mavilia", "http://unoriginality.rocks/"]
 translators:
     - ["Abel Salgado Romero", "https://twitter.com/abelsromero"]
-lang: ca-es
 filename: asciidoc-ca.adoc
 ---
 
diff --git a/ca/go.md b/ca/go.md
index c5ae353b..cf84c592 100644
--- a/ca/go.md
+++ b/ca/go.md
@@ -1,7 +1,6 @@
 ---
 category: language
 language: Go
-lang: ca-es
 filename: learngo-ca.go
 contributors:
     - ["Sonia Keys", "https://github.com/soniakeys"]
diff --git a/ca/groovy.md b/ca/groovy.md
index 0ef1f2ac..e10a872c 100644
--- a/ca/groovy.md
+++ b/ca/groovy.md
@@ -1,7 +1,6 @@
 ---
 category: language
 language: Groovy
-lang: ca-es
 filename: learngroovy-ca.groovy
 contributors:
     - ["Roberto Pérez Alcolea", "http://github.com/rpalcolea"]
diff --git a/ca/html.md b/ca/html.md
index c5c60511..26719f7c 100644
--- a/ca/html.md
+++ b/ca/html.md
@@ -5,7 +5,6 @@ contributors:
     - ["Christophe THOMAS", "https://github.com/WinChris"]
 translators:
     - ["Marc Auledas", "https://github.com/Auledas"]
-lang: ca-es
 ---
 
 HTML significa llenguatge de marques d'hipertext (HyperText Markup Language).
diff --git a/ca/kotlin.md b/ca/kotlin.md
index 8660ae48..662fc8a3 100644
--- a/ca/kotlin.md
+++ b/ca/kotlin.md
@@ -4,7 +4,6 @@ contributors:
     - ["S Webber", "https://github.com/s-webber"]
 translators:
     - ["Xavier Sala", "https://github.com/utrescu"] 
-lang: ca-es
 filename: LearnKotlin-ca.kt
 ---
 
diff --git a/citron.md b/citron.md
index ce607ca1..65594bb2 100644
--- a/citron.md
+++ b/citron.md
@@ -3,7 +3,6 @@ language: citron
 filename: learncitron.ctr
 contributors:
     - ["AnotherTest", ""]
-lang: en-us
 ---
 ```ruby
 # Comments start with a '#'
diff --git a/cs/bf.md b/cs/bf.md
index d49f6873..8f0c1082 100644
--- a/cs/bf.md
+++ b/cs/bf.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Vojta Svoboda", "https://github.com/vojtasvoboda/"]
 filename: learnbrainfuck-cz.bf
-lang: cs-cz
 ---
 
 Brainfuck (psaný bez kapitálek s vyjímkou začátku věty) je extrémně minimální 
diff --git a/cs/css.md b/cs/css.md
index d7875361..8a53453a 100644
--- a/cs/css.md
+++ b/cs/css.md
@@ -8,7 +8,6 @@ contributors:
     - ["Deepanshu Utkarsh", "https://github.com/duci9y"]
 translators:
     - ["Michal Martinek", "https://github.com/MichalMartinek"]
-lang: cs-cz
 filename: learncss-cz.css
 ---
 
diff --git a/cs/elm.md b/cs/elm.md
index 42ec89e5..d9da6586 100644
--- a/cs/elm.md
+++ b/cs/elm.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Robin Pokorný", "http://robinpokorny.com/"]
 filename: learnelm-cz.elm
-lang: cs-cz
 ---
 
 Elm je funkcionální reaktivní jazyk, který se kompiluje do (klientského) JavaScriptu.
diff --git a/cs/go.md b/cs/go.md
index 3237ffd2..b29691dc 100644
--- a/cs/go.md
+++ b/cs/go.md
@@ -2,7 +2,6 @@
 category: language
 language: Go
 filename: learngo-cs.go
-lang: cs-cz
 contributors:
     - ["Sonia Keys", "https://github.com/soniakeys"]
     - ["Christopher Bess", "https://github.com/cbess"]
diff --git a/cs/hack.md b/cs/hack.md
index 9004632a..67c4e2a2 100644
--- a/cs/hack.md
+++ b/cs/hack.md
@@ -5,7 +5,6 @@ contributors:
     - ["Stephen Holdaway", "https://github.com/stecman"]
 translators:
     - ["Vojta Svoboda", "https://github.com/vojtasvoboda/"]
-lang: cs-cz
 ---
 
 Hack je nadmnožinou PHP a běží v rámci virtuálního stroje zvaného HHVM. Hack 
diff --git a/cs/javascript.md b/cs/javascript.md
index 40c89345..18c01c42 100644
--- a/cs/javascript.md
+++ b/cs/javascript.md
@@ -5,7 +5,6 @@ contributors:
     - ["Ariel Krakowski", "http://www.learneroo.com"]
 translators:
     - ["Michal Martinek", "https://github.com/MichalMartinek"]
-lang: cs-cz
 filename: javascript-cz.js
 ---
 
diff --git a/cs/json.md b/cs/json.md
index 1a1f3781..dd7ae50d 100644
--- a/cs/json.md
+++ b/cs/json.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Vojta Svoboda", "https://github.com/vojtasvoboda/"]
 filename: learnjson-cz.json
-lang: cs-cz
 ---
 
 JSON je exterémně jednoduchý datově nezávislý formát a bude asi jeden z 
diff --git a/cs/markdown.md b/cs/markdown.md
index b951aee1..862f69b5 100644
--- a/cs/markdown.md
+++ b/cs/markdown.md
@@ -1,13 +1,11 @@
 ---
 language: Markdown
-lang: cs-cz
 contributors:
     - ["Dan Turkel", "http://danturkel.com/"]
 translators:
     - ["Michal Martinek", "https://github.com/MichalMartinek"]
     - ["Tomáš Hartman", "https://github.com/tomas-hartman"]
 filename: markdown-cz.md
-lang: cs-cz
 ---
 
 Markdown byl vytvořen Johnem Gruberem v roce 2004 jako značkovací jazyk, který
diff --git a/cs/python.md b/cs/python.md
index 3682ce3e..9cdc2eb5 100644
--- a/cs/python.md
+++ b/cs/python.md
@@ -8,7 +8,6 @@ contributors:
 translators:
     - ["Tomáš Bedřich", "http://tbedrich.cz"]
 filename: learnpython-cz.py
-lang: cs-cz
 ---
 
 Python byl vytvořen Guidem Van Rossum v raných 90. letech. Nyní je jedním z nejpopulárnějších jazyků.
diff --git a/cs/sass.md b/cs/sass.md
index 150a2f63..ca41902a 100644
--- a/cs/sass.md
+++ b/cs/sass.md
@@ -6,7 +6,6 @@ contributors:
   - ["Sean Corrales", "https://github.com/droidenator"]
 translators:
   - ["Michal Martinek", "https://github.com/MichalMartinek"]
-lang: cs-cz
 ---
 
 Sass je rozšíření jazyka CSS, který přidává nové vlastnosti jako proměnné, zanořování, mixiny a další.
diff --git a/de/asciidoc.md b/de/asciidoc.md
index 9da4a81a..122c747f 100644
--- a/de/asciidoc.md
+++ b/de/asciidoc.md
@@ -5,7 +5,6 @@ contributors:
 translators:
   - ["Dennis Keller", "https://github.com/denniskeller"]
 filename: asciidoc-de.adoc
-lang: de-de
 ---
 
 AsciiDoc ist eine Auszeichnungssprache, ähnlich wie Markdown. Sie kann für alles
diff --git a/de/bash.md b/de/bash.md
index cdb0d4b6..b0d0beae 100644
--- a/de/bash.md
+++ b/de/bash.md
@@ -1,6 +1,5 @@
 ---
 language: Bash
-lang: de-de
 contributors:
     - ["Max Yankov", "https://github.com/golergka"]
     - ["Darren Lin", "https://github.com/CogBear"]
diff --git a/de/bc.md b/de/bc.md
index 4491efc1..af8ae286 100644
--- a/de/bc.md
+++ b/de/bc.md
@@ -3,7 +3,6 @@ language: bc
 contributors:
     - ["caminsha", "https://github.com/caminsha"]
 filename: learnbc-de.bc
-lang: de-de
 ---
 
 ```bc
diff --git a/de/bf.md b/de/bf.md
index 1ec96ea8..b14f043e 100644
--- a/de/bf.md
+++ b/de/bf.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["urfuchs", "https://github.com/urfuchs"]
 filename: brainfuck-de.bf
-lang: de-de
 
 ---
 
diff --git a/de/c++.md b/de/c++.md
index de581043..853c62db 100644
--- a/de/c++.md
+++ b/de/c++.md
@@ -10,7 +10,6 @@ contributors:
     - ["Jatin Dhankhar", "https://github.com/jatindhankhar"]
     - ["Maximilian Sonnenburg", "https://github.com/LamdaLamdaLamda"]
     - ["caminsha", "https://github.com/caminsha"]
-lang: de-de
 ---
 
 C++ ist eine Systemprogrammiersprache die, 
diff --git a/de/c.md b/de/c.md
index 0a9a0529..4fde797a 100644
--- a/de/c.md
+++ b/de/c.md
@@ -3,7 +3,6 @@ language: C
 filename: learnc-de.c
 contributors:
     - ["caminsha", "https://github.com/caminsha"]
-lang: de-de
 ---
 
 Ach, C. Immer noch **die** Sprache für modernes High-Performance Computing.
diff --git a/de/clojure-macros.md b/de/clojure-macros.md
index bfa86f64..c5e2de5e 100644
--- a/de/clojure-macros.md
+++ b/de/clojure-macros.md
@@ -5,7 +5,6 @@ contributors:
     - ["Adam Bard", "http://adambard.com/"]
 translators:
     - ["Dennis Keller", "https://github.com/denniskeller"]
-lang: de-de
 ---
 
 Wie mit allen Lisps besitzt auch Clojure die inhärente [Homoikonizität](https://en.wikipedia.org/wiki/Homoiconic),
diff --git a/de/clojure.md b/de/clojure.md
index 65d4e89f..033c75c1 100644
--- a/de/clojure.md
+++ b/de/clojure.md
@@ -5,7 +5,6 @@ contributors:
     - ["Adam Bard", "http://adambard.com/"]
 translators:
     - ["Dennis Keller", "https://github.com/denniskeller"]
-lang: de-de
 ---
 
 Clojure ist ein Lispdialekt, der für die Java Virtual Maschine entwickelt worden ist. Sie hat eine stärkere Betonung auf reine [funktionale Programmierung](https://en.wikipedia.org/wiki/Functional_programming) als Common Lisp. Jedoch besitzt sie je nach Bedarf mehrere [STM](https://en.wikipedia.org/wiki/Software_transactional_memory) Werkzeuge zur Handhabung von Zustand.
diff --git a/de/coffeescript.md b/de/coffeescript.md
index 9e5117a5..5ff4f9dc 100644
--- a/de/coffeescript.md
+++ b/de/coffeescript.md
@@ -7,7 +7,6 @@ translators:
   - ["Frederik Ring", "https://github.com/m90"]
   - ["Philipp Fischbeck", "https://github.com/PFischbeck"]
 filename: coffeescript-de.coffee
-lang: de-de
 ---
 
 CoffeeScript ist eine kleine Sprache, die eins zu eins nach JavaScript übersetzt wird - es findet keine Interpretation zur Laufzeit statt.
diff --git a/de/crystal.md b/de/crystal.md
index bea6fb75..30150f6d 100644
--- a/de/crystal.md
+++ b/de/crystal.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["caminsha", "https://github.com/caminsha"]
 filename: learncrystal-de.cr
-lang: de-de
 ---
 
 ```crystal
diff --git a/de/csharp.md b/de/csharp.md
index fa3b0a0d..055ef203 100644
--- a/de/csharp.md
+++ b/de/csharp.md
@@ -8,7 +8,6 @@ contributors:
 translators:
     - ["Frederik Ring", "https://github.com/m90"]
 filename: LearnCSharp-de.cs
-lang: de-de
 ---
 C# ist eine elegante, typsichere und objektorientierte Sprache, mit der Entwickler eine Vielzahl sicherer und robuster Anwendungen erstellen können, die im .NET Framework ausgeführt werden.
 
diff --git a/de/css.md b/de/css.md
index 3c6413fe..e4077217 100644
--- a/de/css.md
+++ b/de/css.md
@@ -4,7 +4,6 @@ contributors:
     - ["Mohammad Valipour", "https://github.com/mvalipour"]
 translators:
     - ["Kyr", "http://github.com/kyrami"]
-lang: de-de
 filename: learncss-de.css
 ---
 
diff --git a/de/d.md b/de/d.md
index ac7a35c5..76c176d8 100644
--- a/de/d.md
+++ b/de/d.md
@@ -5,7 +5,6 @@ contributors:
     - ["Nick Papanastasiou", "www.nickpapanastasiou.github.io"]
 translators:
     - ["Dominik Süß", "www.thesuess.me"]
-lang: de-de
 ---
 
 ```d
diff --git a/de/dhall.md b/de/dhall.md
index 052352f1..977e7d1e 100644
--- a/de/dhall.md
+++ b/de/dhall.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Profpatsch", "http://profpatsch.de"]
 filename: learndhall-de.py
-lang: de-de
 ---
 
 Dhall ist eine programmierbare Konfigurationssprache und bietet eine
diff --git a/de/dynamic-programming.md b/de/dynamic-programming.md
index d0e447c3..0e26e475 100644
--- a/de/dynamic-programming.md
+++ b/de/dynamic-programming.md
@@ -5,7 +5,6 @@ contributors:
     - ["Akashdeep Goel", "http://github.com/akashdeepgoel"]
 translators:
     - ["Henrik Jürges", "http://github.com/santifa"]
-lang: de-de
 ---
 
 # Dynamische Programmierung
diff --git a/de/edn.md b/de/edn.md
index e69728ab..98709ef1 100644
--- a/de/edn.md
+++ b/de/edn.md
@@ -6,7 +6,6 @@ contributors:
   - ["Jonathan D Johnston", "https://github.com/jdjohnston"]
 translators:
     - ["Dennis Keller", "https://github.com/denniskeller"]
-lang: de-de
 ---
 
 Extensible Data Notation (EDN) ist ein Format für serialisierte Daten.
diff --git a/de/elixir.md b/de/elixir.md
index a91288c9..1ca82381 100644
--- a/de/elixir.md
+++ b/de/elixir.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Gregor Große-Bölting", "http://www.ideen-und-soehne.de"]
 filename: learnelixir-de.ex
-lang: de-de
 ---
 
 Elixir ist eine moderne, funktionale Sprache für die Erlang VM. Sie ist voll 
diff --git a/de/elm.md b/de/elm.md
index 9a188422..c176750e 100644
--- a/de/elm.md
+++ b/de/elm.md
@@ -5,7 +5,6 @@ contributors:
   - ["Max Goldstein", "http://maxgoldste.in/"]
 translators:
   - ["waynee95", "https://waynee95.me"]
-lang: de-de
 ---
 
 Elm ist eine pure funktionale Programmiersprache. Mit Elm werden GUIs
diff --git a/de/git.md b/de/git.md
index b903a9d1..358b3270 100644
--- a/de/git.md
+++ b/de/git.md
@@ -5,7 +5,6 @@ contributors:
     - ["Jake Prather", "http://github.com/JakeHP"]
 translators:
     - ["kultprok", "http://www.kulturproktologie.de"]
-lang: de-de
 ---
 
 Git ist eine verteilte Versions- und Quellcodeverwaltung. 
diff --git a/de/go.md b/de/go.md
index 8c677d48..656cf00a 100644
--- a/de/go.md
+++ b/de/go.md
@@ -6,7 +6,6 @@ contributors:
     - ["Dennis Keller", "https://github.com/denniskeller"]
 translators:
     - ["Jerome Meinke", "https://github.com/jmeinke"]
-lang: de-de
 ---
 Die Sprache Go (auch golang) wurde von Google entwickelt und wird seit 2007
 benutzt. Go ähnelt in der Syntax der Sprache C, bietet darüber hinaus aber viele
diff --git a/de/hack.md b/de/hack.md
index 88882280..7a18721a 100644
--- a/de/hack.md
+++ b/de/hack.md
@@ -1,6 +1,5 @@
 ---
 language: Hack
-lang: de-de
 contributors:
     - ["Stephen Holdaway", "https://github.com/stecman"]
     - ["David Lima", "https://github.com/davelima"]
diff --git a/de/haml.md b/de/haml.md
index 0552835f..91bf2579 100644
--- a/de/haml.md
+++ b/de/haml.md
@@ -4,7 +4,6 @@ filename: learnhaml-de.haml
 contributors:
   - ["Simon Neveu", "https://github.com/sneveu"]
   - ["Sol Bekic", "https://github.com/S0lll0s"]
-lang: de-de
 ---
 
 Haml ist eine Markup- und Templatingsprache, aufgesetzt auf Ruby, mit der HTML Dokumente einfach beschrieben werden können.
diff --git a/de/haskell.md b/de/haskell.md
index 134788a4..bd1569c6 100644
--- a/de/haskell.md
+++ b/de/haskell.md
@@ -1,6 +1,5 @@
 ---
 language: Haskell
-lang: de-de
 contributors:
     - ["Adit Bhargava", "http://adit.io"]
 translators:
diff --git a/de/hq9+.md b/de/hq9+.md
index addc84e4..684a084a 100644
--- a/de/hq9+.md
+++ b/de/hq9+.md
@@ -5,7 +5,6 @@ contributors:
     - ["Alexey Nazaroff", "https://github.com/rogaven"]
 translators:
     - ["Dennis Keller", "https://github.com/denniskeller"]
-lang: de-de
 ---
 
 HQ9+ ist eine Parodie auf esoterische Programmiersprachen und wurde von Cliff Biffle kreiert.
diff --git a/de/html.md b/de/html.md
index ffbf5484..ed47e350 100644
--- a/de/html.md
+++ b/de/html.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Dennis Keller", "https://github.com/denniskeller"]
 filename: learnhtml-de.txt
-lang: de-de
 ---
 
 HTML steht für HyperText Markup Language (Hypertext-Auszeichnungssprache).
diff --git a/de/java.md b/de/java.md
index c5bf0e69..dab13000 100644
--- a/de/java.md
+++ b/de/java.md
@@ -8,7 +8,6 @@ contributors:
     - ["Simon Morgan", "http://sjm.io/"]
 translators:
     - ["Michael Dähnert", "http://github.com/JaXt0r"]
-lang: de-de
 ---
 
 Java ist eine Programmiersprache für vielfältige Aufgaben. Sie ist imperative und objektorientiert.
diff --git a/de/javascript.md b/de/javascript.md
index 282fc50d..f8d1a076 100644
--- a/de/javascript.md
+++ b/de/javascript.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["ggb", "http://www.ideen-und-soehne.de"]
 filename: learnjavascript-de.js
-lang: de-de
 ---
 
 JavaScript wurde im Jahr 1995 von Brendan Eich bei Netscape entwickelt. Ursprünglich war es als einfachere Skriptsprache für Websites gedacht, ergänzend zu Java, das für komplexere Webanwendungen verwendet wird. Die enge Integration in Websites und der in Browser eingebaute Support der Sprache haben dafür gesorgt, dass JavaScript weit häufiger für Web-Frontends verwendet wird als Java.
diff --git a/de/json.md b/de/json.md
index c3656e30..a5ff3e7c 100644
--- a/de/json.md
+++ b/de/json.md
@@ -6,7 +6,6 @@ contributors:
   - ["Marco Scannadinari", "https://github.com/marcoms"]
 translators:
   - ["Timm Albers", "https://github.com/nunull"]
-lang: de-de
 ---
 
 Da JSON ein äußerst einfaches Format für den Austausch von Daten ist, wird dieses
diff --git a/de/latex.md b/de/latex.md
index 6d5a4805..26d817ea 100644
--- a/de/latex.md
+++ b/de/latex.md
@@ -7,7 +7,6 @@ contributors:
 translators:
   - ["Moritz Kammerer", "https://github.com/phxql"]
   - ["Jerome Meinke", "https://github.com/jmeinke"]
-lang: de-de
 filename: latex-de.tex
 ---
 ```
diff --git a/de/lolcode.md b/de/lolcode.md
index 57eb0ff8..290836a0 100644
--- a/de/lolcode.md
+++ b/de/lolcode.md
@@ -5,7 +5,6 @@ contributors:
     - ["abactel", "https://github.com/abactel"]
 translators:
     - ["Henrik Jürges", "http://github.com/santifa"]
-lang: de-de
 ---
 
 LOLCODE ist eine esoterische Programmiersprache die die Sprache der [lolcats](https://upload.wikimedia.org/wikipedia/commons/a/ab/Lolcat_in_folder.jpg?1493656347257) nachahmt.
diff --git a/de/lua.md b/de/lua.md
index 619d18b0..fc61fee5 100644
--- a/de/lua.md
+++ b/de/lua.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Martin Schimandl", "https://github.com/Git-Jiro"]
 filename: learnlua-de.lua
-lang: de-de
 ---
 
 ```lua
diff --git a/de/make.md b/de/make.md
index eaaba78a..ccca671c 100644
--- a/de/make.md
+++ b/de/make.md
@@ -7,7 +7,6 @@ contributors:
 translators:
   - ["Martin Schimandl", "https://github.com/Git-Jiro"]
 filename: Makefile-de
-lang: de-de
 ---
 
 Eine Makefile definiert einen Graphen von Regeln um ein Ziel (oder Ziele)
diff --git a/de/markdown.md b/de/markdown.md
index be992235..f47717fb 100644
--- a/de/markdown.md
+++ b/de/markdown.md
@@ -6,7 +6,6 @@ translators :
     - ["Frederik Ring", "https://github.com/m90"]
     - ["Philipp Fischbeck", "https://github.com/PFischbeck"]
 filename: markdown-de.md
-lang: de-de
 ---
 
 Markdown wurde im Jahr 2004 von John Gruber kreiert. Ziel ist und war eine
diff --git a/de/nix.md b/de/nix.md
index a1a613df..eae6ab40 100644
--- a/de/nix.md
+++ b/de/nix.md
@@ -5,7 +5,6 @@ contributors:
     - ["Chris Martin", "http://chris-martin.org/"]
 translators:
     - ["Dennis Keller", "https://github.com/denniskeller"]
-lang: de-de
 ---
 
 Nix ist eine simple funktionale Programmiersprache, die für den
diff --git a/de/opencv.md b/de/opencv.md
index c39e5a65..711c97f1 100644
--- a/de/opencv.md
+++ b/de/opencv.md
@@ -6,7 +6,6 @@ contributors:
     - ["Yogesh Ojha", "http://github.com/yogeshojha"]
 translators:
     - ["Dennis Keller", "https://github.com/denniskeller"]
-lang: de-de
 ---
 
 OpenCV (Open Source Computer Vision) ist eine Bibliothek von Programmierfunktionen,
diff --git a/de/paren.md b/de/paren.md
index 517c5c75..36075651 100644
--- a/de/paren.md
+++ b/de/paren.md
@@ -7,7 +7,6 @@ contributors:
   - ["Claudson Martins", "https://github.com/claudsonm"]
 translators:
     - ["Dennis Keller", "https://github.com/denniskeller"]
-lang: de-de
 ---
 
 [Paren](https://bitbucket.org/ktg/paren) ist ein Dialekt von Lisp.
diff --git a/de/perl.md b/de/perl.md
index a517b921..b07076d9 100644
--- a/de/perl.md
+++ b/de/perl.md
@@ -5,7 +5,6 @@ contributors:
     - ["Korjavin Ivan", "http://github.com/korjavin"]
 translators:
     - ["Martin Schimandl", "http://github.com/Git-Jiro"]
-lang: de-de
 ---
 
 Perl ist eine sehr mächtige, funktionsreiche Programmiersprache mit über 25 Jahren Entwicklungsgeschichte.
diff --git a/de/processing.md b/de/processing.md
index 12f40067..fae6e0d5 100644
--- a/de/processing.md
+++ b/de/processing.md
@@ -6,7 +6,6 @@ contributors:
     - ["Divay Prakash", "https://github.com/divayprakash"]
 translators:
   - ["caminsha", "https://github.com/caminsha"]
-lang: de-de
 ---
 
 ## Einführung
diff --git a/de/pug.md b/de/pug.md
index ec03024a..a3410615 100644
--- a/de/pug.md
+++ b/de/pug.md
@@ -5,7 +5,6 @@ contributors:
 filename: lernepug-de.pug
 translators:
     - ["denniskeller", "https://github.com/denniskeller"]
-lang: de-de
 ---
 
 Pug ist eine kleine Sprache, die zu HTML kompiliert. Sie hat eine
diff --git a/de/pyqt.md b/de/pyqt.md
index 189de030..c44072e8 100644
--- a/de/pyqt.md
+++ b/de/pyqt.md
@@ -6,7 +6,6 @@ contributors:
     - ["Nathan Hughes", "https://github.com/sirsharpest"]
 translators:
     - ["Dennis Keller", "https://github.com/denniskeller"]
-lang: de-de
 ---
 
 **Qt** ist ein weit bekanntes Framework, mit dem man plattformunabhängige Programme schreiben kann,
diff --git a/de/python.md b/de/python.md
index 6469d43e..d71a9bdb 100644
--- a/de/python.md
+++ b/de/python.md
@@ -6,7 +6,6 @@ translators:
     - ["kultprok", "http:/www.kulturproktologie.de"]
     - ["matthiaskern", "https://github.com/matthiaskern"]
 filename: learnpython-de.py
-lang: de-de
 ---
 
 Anmerkungen des ursprünglichen Autors:
diff --git a/de/pythonlegacy.md b/de/pythonlegacy.md
index c042f48a..e56c6c76 100644
--- a/de/pythonlegacy.md
+++ b/de/pythonlegacy.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["kultprok", "http:/www.kulturproktologie.de"]
 filename: learnpythonlegacy-de.py
-lang: de-de
 ---
 
 Anmerkungen des ursprünglichen Autors:
diff --git a/de/qt.md b/de/qt.md
index 96cc0e30..35200c4c 100644
--- a/de/qt.md
+++ b/de/qt.md
@@ -7,7 +7,6 @@ contributors:
     - ["Aleksey Kholovchuk", "https://github.com/vortexxx192"]
 translators:
     - ["Dennis Keller", "https://github.com/denniskeller"]
-lang: de-de    
 ---
 
 **Qt** ist ein weithin bekanntes Framework zum Entwickeln von Cross-Platform Software,
diff --git a/de/rst.md b/de/rst.md
index dce862de..c09f6eb3 100644
--- a/de/rst.md
+++ b/de/rst.md
@@ -6,7 +6,6 @@ contributors:
     - ["Andre Polykanine", "https://github.com/Oire"]
 translators:
     - ["Dennis Keller", "https://github.com/denniskeller"]
-lang: de-de
 ---
 
 RST ist ein Dateiformat, das von der Python Community entwickelt wurde,
diff --git a/de/ruby-ecosystem.md b/de/ruby-ecosystem.md
index e75e49bc..80bfd530 100644
--- a/de/ruby-ecosystem.md
+++ b/de/ruby-ecosystem.md
@@ -7,7 +7,6 @@ contributors:
 translators:
   - ["Christian Albrecht", "https://github.com/coastalchief"]
 filename: ruby-ecosystem-de.txt
-lang: de-de
 ---
 
 Hier gibt es einen Überblick über die gängigsten Tools zur Verwaltung  
diff --git a/de/ruby.md b/de/ruby.md
index a9bdba59..fa31350c 100644
--- a/de/ruby.md
+++ b/de/ruby.md
@@ -22,7 +22,6 @@ translators:
   - ["Christian Albrecht", "https://github.com/coastalchief"]
   - ["Dennis Keller", "https://github.com/denniskeller"]
   - ["Paul Götze", "https://gitub.com/paulgoetze"]
-lang: de-de
 ---
 
 ```ruby
diff --git a/de/rust.md b/de/rust.md
index 21c4e3cb..77a57778 100644
--- a/de/rust.md
+++ b/de/rust.md
@@ -4,7 +4,6 @@ contributors:
     - ["P1start", "http://p1start.github.io/"]
 translators:
     - ["Christian Albrecht", "https://github.com/coastalchief"]
-lang: de-de
 filename: lernerust-de.rs
 ---
 
diff --git a/de/sass.md b/de/sass.md
index 581a70f4..f3dfc449 100644
--- a/de/sass.md
+++ b/de/sass.md
@@ -7,7 +7,6 @@ contributors:
   - ["Kyle Mendes", "https://github.com/pink401k"]
 translators:
     - ["Philipp Bochmann", "https://github.com/phbo85"]  
-lang: de-de
 ---
 Sass ist eine CSS-erweiternde Sprache, welche Features wie Variablen, Verschachtelung, Mixins und mehr hinzufügt.
 Sass (und andere Präprozessoren wie [Less](http://lesscss.org/)) helfen Entwicklern dabei ihren Code wartbar und DRY (Don't Repeat Yourself - wiederhole dich nicht) zu schreiben.
diff --git a/de/scala.md b/de/scala.md
index 3dbf1b98..ec0c048e 100644
--- a/de/scala.md
+++ b/de/scala.md
@@ -10,7 +10,6 @@ translators:
   - ["Christian Albrecht", "https://github.com/coastalchief"]
   - ["Jonas Grote", "https://github.com/exic"]
 filename: learnscala-de.scala
-lang: de-de
 ---
 
 Scala ist eine funktionale und objektorientierte Programmiersprache
diff --git a/de/shutit.md b/de/shutit.md
index 2af72bde..9b1e9091 100644
--- a/de/shutit.md
+++ b/de/shutit.md
@@ -6,7 +6,6 @@ contributors:
     - ["Ian Miell", "http://ian.meirionconsulting.tk"]
 translators:
     - ["Dennis Keller", "https://github.com/denniskeller"]
-lang: de-de
 ---
 
 ## ShutIt
diff --git a/de/sql.md b/de/sql.md
index b9705269..360d3f9f 100644
--- a/de/sql.md
+++ b/de/sql.md
@@ -5,7 +5,6 @@ contributors:
   - ["Bob DuCharme", "http://bobdc.com/"]
 translators:
     - ["denniskeller", "https://github.com/denniskeller"]
-lang: de-de
 ---
 
 Die Structured Query Language (SQL) ist eine ISO Standardsprache zum Erstellen und Arbeiten mit Datenbanken, die in einem Set von Tabellen gespeichert sind. Implementierungen fügen in der Regel eigene Erweiterungen zur Sprache hinzu; [Der Vergleich von verschiedenen SQL Implementierungen](http://troels.arvin.dk/db/rdbms/) ist eine gute Referenz für Produktunterschiede.
diff --git a/de/swift.md b/de/swift.md
index 97fe7ee5..f58d0f28 100644
--- a/de/swift.md
+++ b/de/swift.md
@@ -8,7 +8,6 @@ contributors:
 translators:
     - ["Jonas Wippermann", "http://vfuc.co"]
 filename: learnswift-de.swift
-lang: de-de
 ---
 
 Swift ist eine Programmiersprache von Apple für die Entwicklung von iOS und macOS Applikationen. Swift wurde 2014 zu Apples WWDC Entwicklerkonferenz vorgestellt und wurde mit dem Ziel entwickelt, fehlerträchtigen Code zu vermeiden sowie mit Objective-C zu koexistieren. Es wird mit dem LLVM Compiler gebaut und ist ab Xcode 6+ verfügbar.
diff --git a/de/tcl.md b/de/tcl.md
index 321c6d45..17218b8c 100644
--- a/de/tcl.md
+++ b/de/tcl.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Martin Schimandl", "https://github.com/Git-Jiro"]
 filename: learntcl-de.tcl
-lang: de-de
 ---
 
 Tcl wurde kreiert von [John Ousterhout](http://wiki.tcl.tk/John Ousterout) als
diff --git a/de/vim.md b/de/vim.md
index 7114be87..40953be1 100644
--- a/de/vim.md
+++ b/de/vim.md
@@ -1,7 +1,6 @@
 ---
 category: tool
 tool: Vim
-lang: de-de
 contributors:
 - ["RadhikaG", "https://github.com/RadhikaG"]
 translators:
diff --git a/de/visualbasic.md b/de/visualbasic.md
index c007eb86..fd3d7867 100644
--- a/de/visualbasic.md
+++ b/de/visualbasic.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Enno Nagel", "https://github.com/konfekt"]
 filename: learnvisualbasic-de.vb
-lang: de-de
 ---
 
 ```vbnet
diff --git a/de/yaml.md b/de/yaml.md
index 1173f939..ac50f570 100644
--- a/de/yaml.md
+++ b/de/yaml.md
@@ -5,7 +5,6 @@ contributors:
 translators:
   - ["Ruben M.", "https://github.com/switchhax"]
 filename: learnyaml-de.yaml
-lang: de-de
 ---
 
 YAML ist eine Sprache zur Datenserialisierung, die sofort von Menschenhand geschrieben und gelesen werden kann.
diff --git a/el/bash.md b/el/bash.md
index 700b691b..5db11cab 100644
--- a/el/bash.md
+++ b/el/bash.md
@@ -3,7 +3,6 @@ language: Bash
 contributors:
     - ["Dimitri Kokkonis", "https://github.com/kokkonisd"]
 filename: LearnBash-gr.sh
-lang: el-gr
 ---
 
 Η λέξη «bash» είναι ένα από τα ονόματα του unix shell (τερματικός), το οποίο
diff --git a/el/css.md b/el/css.md
index 39ad16cb..49f03c2e 100644
--- a/el/css.md
+++ b/el/css.md
@@ -3,7 +3,6 @@ language: CSS
 contributors:
     - ["Kostas Bariotis", "http://kostasbariotis.com"]
 filename: css-gr.css
-lang: el-gr
 ---
 
 Η αρχική μορφή του Παγκόσμιου Ιστού αποτελείτο απο καθαρό κείμενο, χωρίς οπτικά αντικείμενα. Με το πέρας 
diff --git a/el/haskell.md b/el/haskell.md
index 2d25b098..f60ab016 100644
--- a/el/haskell.md
+++ b/el/haskell.md
@@ -2,7 +2,6 @@
 language: Haskell
 contributors:
     - ["Miltiadis Stouras", "https://github.com/mstou"]
-lang: el-gr
 filename: learnhaskell-gr.hs
 ---
 
diff --git a/el/html.md b/el/html.md
index 7590a9c1..78b454ab 100644
--- a/el/html.md
+++ b/el/html.md
@@ -3,7 +3,6 @@ language: HTML
 filename: learnhtml-gr.txt
 contributors:
     - ["Dimitri Kokkonis", "https://github.com/kokkonisd"]
-lang: el-gr
 ---
 
 Το ακρώνυμο HTML σημαίνει HyperText Markup Language.
diff --git a/el/java.md b/el/java.md
index d3855f41..952a7f52 100644
--- a/el/java.md
+++ b/el/java.md
@@ -11,7 +11,6 @@ contributors:
 filename: LearnJava-gr.java
 translators:
   - ["Andreas Loizou" , "https://github.com/lack3r/"]
-lang: el-gr
 ---
 
 H Java είναι μία γενικού-σκοπού, συντρέχων (concurrent), βασισμένη σε κλάσεις, 
diff --git a/el/json.md b/el/json.md
index 29e92bea..697c3eb4 100644
--- a/el/json.md
+++ b/el/json.md
@@ -9,7 +9,6 @@ contributors:
   - ["Athanasios Emmanouilidis", "https://github.com/athanasiosem"]
 translators:
   - ["Athanasios Emmanouilidis", "https://github.com/athanasiosem"]
-lang: el-gr
 ---
 
 Το JSON (JavaScript Object Notation) είναι ένα πολύ απλό και ελαφρύ μορφότυπο ανταλλαγής δεδομένων. Όπως αναφέρεται και στην ιστοσελίδα [json.org](http://json.org), το JSON διαβάζεται και γράφεται εύκολα από τους ανθρώπους όπως επίσης αναλύεται και παράγεται εύκολα από τις μηχανές.
diff --git a/el/ocaml.md b/el/ocaml.md
index 6384b1a6..f279f633 100644
--- a/el/ocaml.md
+++ b/el/ocaml.md
@@ -5,7 +5,6 @@ contributors:
     - ["Daniil Baturin", "http://baturin.org/"]
 translators:
     - ["Chariton Charitonidis", "https://github.com/haritonch"]
-lang: el-gr
 ---
 
 Η OCaml είναι μία strictly evaluated συναρτησιακή γλώσσα με κάποια στοιχεία
diff --git a/el/python.md b/el/python.md
index aecd88f4..3ed1f709 100644
--- a/el/python.md
+++ b/el/python.md
@@ -9,7 +9,6 @@ contributors:
     - ["Rommel Martinez", "https://ebzzry.io"]
     - ["Roberto Fernandez Diaz", "https://github.com/robertofd1995"]
 filename: learnpython-gr.py
-lang: el-gr
 ---
 
 Η Python δημιουργήθηκε από τον Guido van Rossum στις αρχές των 90s. Πλέον είναι μία από τις πιο
diff --git a/el/racket.md b/el/racket.md
index 47645222..f4d00400 100644
--- a/el/racket.md
+++ b/el/racket.md
@@ -9,7 +9,6 @@ contributors:
   - ["Keyan Zhang", "https://github.com/keyanzhang"]
 translators:
   - ["Vasilis Panagiotopoulos" , "https://github.com/billpcs/"]
-lang: el-gr
 ---
 
 H Racket είναι μια γενικού σκοπού, πολυ-υποδειγματική γλώσσα προγραμματισμού που ανήκει 
diff --git a/el/rust.md b/el/rust.md
index 140be4a8..3c957733 100644
--- a/el/rust.md
+++ b/el/rust.md
@@ -4,7 +4,6 @@ contributors:
     - ["P1start", "http://p1start.github.io/"]
     - ["Dimitri Kokkonis", "https://github.com/kokkonisd"]
 filename: learnrust-gr.rs
-lang: el-gr
 ---
 
 _[ΣτΜ.: οι όροι "χαμηλό/υψηλό επίπεδο" αναφέρονται στην εγγύτητα μιας γλώσσας προγραμματισμού ή γενικότερα ενός
diff --git a/el/scala.md b/el/scala.md
index 8af4b2c5..aa57416d 100644
--- a/el/scala.md
+++ b/el/scala.md
@@ -7,7 +7,6 @@ contributors:
 translators:
     - ["Vasilis Panagiotopoulos" , "https://github.com/billpcs/"]
 filename: learnscala-gr.scala
-lang: el-gr
 ---
 
 Scala - Η επεκτάσιμη γλώσσα
diff --git a/el/vim.md b/el/vim.md
index 0cc1575f..0aad8700 100644
--- a/el/vim.md
+++ b/el/vim.md
@@ -4,7 +4,6 @@ tool: Vim
 contributors:
     - ["RadhikaG", "https://github.com/RadhikaG"]
 filename: LearnVim-gr.txt
-lang: el-gr
 ---
 
 
diff --git a/es/amd.md b/es/amd.md
index bf3cc62e..ebb855ff 100644
--- a/es/amd.md
+++ b/es/amd.md
@@ -8,7 +8,6 @@ contributors:
 translators:
     - ["Damaso Sanoja", "https://github.com/damasosanoja"]
 filename: learnamd-es.js
-lang: es-es
 ---
 
 ## Iniciando con AMD
diff --git a/es/asciidoc.md b/es/asciidoc.md
index 09c4afc5..2ea285cf 100644
--- a/es/asciidoc.md
+++ b/es/asciidoc.md
@@ -4,7 +4,6 @@ contributors:
     - ["Ryan Mavilia", "http://unoriginality.rocks/"]
 translators:
     - ["Abel Salgado Romero", "https://twitter.com/abelsromero"]
-lang: es-es
 filename: asciidoc-es.adoc
 ---
 
diff --git a/es/asymptotic-notation.md b/es/asymptotic-notation.md
index 7ee21c6d..d8088547 100644
--- a/es/asymptotic-notation.md
+++ b/es/asymptotic-notation.md
@@ -5,7 +5,6 @@ contributors:
     - ["Jake Prather", "http://github.com/JakeHP"]
 translators:
     - ["Gerson Lázaro", "https://gersonlazaro.com"]
-lang: es-es
 ---
 
 # Notaciones asintóticas
diff --git a/es/awk.md b/es/awk.md
index bb3e6db8..c0f30e92 100644
--- a/es/awk.md
+++ b/es/awk.md
@@ -6,7 +6,6 @@ contributors:
     - ["Marshall Mason", "http://github.com/marshallmason"]
 translators:
     - ["Hugo Guillén-Ramírez", "http://github.com/HugoGuillen"]
-lang: es-es
 ---
 
 AWK es una herramienta estándar en cada sistema UNIX compatible con POSIX.
diff --git a/es/bash.md b/es/bash.md
index 6194304f..0e7ebdf1 100644
--- a/es/bash.md
+++ b/es/bash.md
@@ -10,7 +10,6 @@ contributors:
 translators:
     - ["Daniel Zendejas", "https://github.com/danielzendejas"]
 filename: LearnBash-es.sh
-lang: es-es
 ---
 
 Tutorial de Shell en español.
diff --git a/es/bf.md b/es/bf.md
index e611beef..21723e7e 100644
--- a/es/bf.md
+++ b/es/bf.md
@@ -6,7 +6,6 @@ contributors:
     - ["Mathias Bynens", "http://mathiasbynens.be/"]
 translators:
     - ["Daniel Zendejas", "https://github.com/DanielZendejas"]
-lang: es-es
 ---
 
 Brainfuck (con mayúscula sólo al inicio de una oración) es un
diff --git a/es/c++.md b/es/c++.md
index 16abdcb0..1f2029ac 100644
--- a/es/c++.md
+++ b/es/c++.md
@@ -9,7 +9,6 @@ contributors:
 translators:
     - ["Gerson Lázaro", "https://gersonlazaro.com"]
     - ["Diego Ramirez", "https://DiddiLeija.github.io"]
-lang: es-es
 ---
 
 C++ es un lenguaje de programación de sistemas que,
diff --git a/es/c.md b/es/c.md
index 6f9968e6..93e090ab 100644
--- a/es/c.md
+++ b/es/c.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Francisco García", "http://flaskbreaker.tumblr.com/"]
     - ["Heitor P. de Bittencourt", "https://github.com/heitorPB/"]
-lang: es-es
 ---
 
 ¡Ah!, C. Aun hoy en día sigue siendo el lenguaje por excelencia de la
diff --git a/es/chapel.md b/es/chapel.md
index 73b64a06..5de3bf39 100644
--- a/es/chapel.md
+++ b/es/chapel.md
@@ -6,7 +6,6 @@ contributors:
     - ["Ben Harshbarger", "https://github.com/benharsh/"]
 translators:
     - ["Ivan Alburquerque", "https://github.com/AlburIvan"]
-lang: es-es
 ---
 
 Puede leer todo sobre Chapel en [el sitio web oficial de Chapel de Cray](https://chapel-lang.org).
diff --git a/es/clojure.md b/es/clojure.md
index a33b4e26..7778170f 100644
--- a/es/clojure.md
+++ b/es/clojure.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Antonio Hernández Blas", "https://twitter.com/nihilipster"]
     - ["Guillermo Vayá Pérez", "http://willyfrog.es"]
-lang: es-es
 ---
 
 Clojure es un lenguaje de la familia Lisp desarrollado para la Máquina Virtual
diff --git a/es/coffeescript.md b/es/coffeescript.md
index d93b6f03..a342570a 100644
--- a/es/coffeescript.md
+++ b/es/coffeescript.md
@@ -1,6 +1,5 @@
 ---
 language: CoffeeScript
-lang: es-es
 contributors:
   - ["Tenor Biel", "http://github.com/L8D"]
 translators:
diff --git a/es/coldfusion.md b/es/coldfusion.md
index 6d376aa0..18708bd7 100644
--- a/es/coldfusion.md
+++ b/es/coldfusion.md
@@ -6,7 +6,6 @@ contributors:
     - ["Kevin Morris", "https://twitter.com/kevinmorris"]
 translators:
     - ["Ivan Alburquerque", "https://github.com/AlburIvan"]
-lang: es-es
 ---
 
 ColdFusion es un lenguaje de scripting para desarrollo web.
diff --git a/es/common-lisp.md b/es/common-lisp.md
index d764bd46..124d5a9f 100644
--- a/es/common-lisp.md
+++ b/es/common-lisp.md
@@ -8,7 +8,6 @@ contributors:
 translators:
   - ["ivanchoff", "https://github.com/ivanchoff"]
   - ["Andre Polykanine", "https://github.com/Menelion"]
-lang: es-es
 ---
 
 Common Lisp es un lenguaje de proposito general y multiparadigma adecuado para una amplia variedad
diff --git a/es/csharp.md b/es/csharp.md
index 988d8378..aa2378c9 100644
--- a/es/csharp.md
+++ b/es/csharp.md
@@ -6,7 +6,6 @@ contributors:
     - ["Max Yankov", "https://github.com/golergka"]
 translators:
     - ["Olfran Jiménez", "https://twitter.com/neslux"]
-lang: es-es
 
 ---
 
diff --git a/es/css.md b/es/css.md
index 5ce168be..f48e0762 100644
--- a/es/css.md
+++ b/es/css.md
@@ -10,7 +10,6 @@ contributors:
     - ["Tyler Mumford", "https://tylermumford.com"]
 translators:
     - ["miky ackerman", "https://github.com/mikyackerman"]
-lang: es-es
 filename: learncss-es.css
 ---
 
diff --git a/es/curto.md b/es/curto.md
index 24a9bfbd..2da1287d 100644
--- a/es/curto.md
+++ b/es/curto.md
@@ -2,7 +2,6 @@
 language: curto
 contributors:
     - ["Maleza", "https://maleza.srht.site/"]
-lang: es-es
 filename: learncurto-es.fs
 ---
 
diff --git a/es/dart.md b/es/dart.md
index 2ddb87b7..b4dc04a0 100644
--- a/es/dart.md
+++ b/es/dart.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Jorge Antonio Atempa", "http://www.twitter.com/atempa09"]
 filename: dart-es.dart
-lang: es-es
 ---
 
 Dart es un recién llegado al ámbito de los lenguajes de programación.
diff --git a/es/docker.md b/es/docker.md
index f6a5098c..ba2530ce 100644
--- a/es/docker.md
+++ b/es/docker.md
@@ -4,7 +4,6 @@ filename: docker-es.bat
 contributors:
     - ["Ruslan López", "http://javapro.org/"]
     - ["Michael Chen", "https://github.com/ML-Chen"]
-lang: es-es
 ---
 
 ```bat
diff --git a/es/dynamic-programming.md b/es/dynamic-programming.md
index e613b722..a90fc36a 100644
--- a/es/dynamic-programming.md
+++ b/es/dynamic-programming.md
@@ -5,7 +5,6 @@ contributors:
     - ["Akashdeep Goel", "http://github.com/akashdeepgoel"]
 translators:
     - ["Gino Amaury", "https://github.com/ginoamaury"]
-lang: es-es 
 ---
 
 # Programación Dinámica
diff --git a/es/edn.md b/es/edn.md
index df44e674..3d89a9dd 100644
--- a/es/edn.md
+++ b/es/edn.md
@@ -5,7 +5,6 @@ contributors:
   - ["Jason Yeo", "https://github.com/jsyeo"]
 translators:
     - ["Gino Amaury", "https://github.com/ginoamaury"]
-lang: es-es 
 ---
 
 La notación de datos extensible (Extensible Data Notation (EDN)) es un formato para serializar los datos.
diff --git a/es/elisp.md b/es/elisp.md
index 37711604..65f4141b 100644
--- a/es/elisp.md
+++ b/es/elisp.md
@@ -4,7 +4,6 @@ contributors:
     - ["Bastien Guerry", "http://bzg.fr"]
 translators:
     - ["Guillermo Vayá", "http://willyfrog.es"]
-lang: es-es
 filename: learn-emacs-lisp-es.el
 ---
 
diff --git a/es/elixir.md b/es/elixir.md
index 14d2938b..c198f9bb 100644
--- a/es/elixir.md
+++ b/es/elixir.md
@@ -7,7 +7,6 @@ contributors:
 translator:
     - ["Adrian Carrascal", "https://github.com/acarrascalgarcia"]
 filename: learnelixir-es.ex
-lang: es-es
 
 ---
 
diff --git a/es/factor.md b/es/factor.md
index 5e31cc3a..9ef5facd 100644
--- a/es/factor.md
+++ b/es/factor.md
@@ -6,7 +6,6 @@ translators:
     - ["Roberto R", "https://github.com/rrodriguze"]
 filename: learnfactor-es.factor
 
-lang: es-es
 ---
 Factor es un lenguaje moderno basado en la pila, basado en Forth, creado por
 Slava Pestov.
diff --git a/es/forth.md b/es/forth.md
index 3482a199..40ab48e0 100644
--- a/es/forth.md
+++ b/es/forth.md
@@ -4,7 +4,6 @@ contributors:
     - ["Horse M.D.", "http://github.com/HorseMD/"]
 translators:
     - ["Zach Larsen", "http://zachariahlarsen.com/"]
-lang: es-es
 filename: learnforth-es.fs
 ---
 
diff --git a/es/fsharp.md b/es/fsharp.md
index b7f80c44..22b7e076 100644
--- a/es/fsharp.md
+++ b/es/fsharp.md
@@ -1,6 +1,5 @@
 ---
 language: F#
-lang: es-es
 contributors:
   - ['Scott Wlaschin', 'http://fsharpforfunandprofit.com/']
 translators:
diff --git a/es/git.md b/es/git.md
index f05735d3..9112fd10 100644
--- a/es/git.md
+++ b/es/git.md
@@ -6,7 +6,6 @@ contributors:
     - ["Jake Prather", "http://github.com/JakeHP"]
 translator:
     - ["Raúl Ascencio", "http://rscnt.github.io"]
-lang: es-es
 
 ---
 
diff --git a/es/go.md b/es/go.md
index 7218eaeb..6f2de5c5 100644
--- a/es/go.md
+++ b/es/go.md
@@ -1,7 +1,6 @@
 ---
 category: language
 language: Go
-lang: es-es
 filename: learngo-es.go
 contributors:
     - ["Sonia Keys", "https://github.com/soniakeys"]
diff --git a/es/groovy.md b/es/groovy.md
index c2bb6e0c..39ea8f9a 100644
--- a/es/groovy.md
+++ b/es/groovy.md
@@ -4,7 +4,6 @@ contributors:
     - ["Roberto Pérez Alcolea", "http://github.com/rpalcolea"]
 translators:
     - ["Jhoon Saravia", "https://github.com/jhoon"]
-lang: es-es
 filename: groovy-es.groovy
 ---
 
diff --git a/es/hack.md b/es/hack.md
index 368e0237..39636d06 100644
--- a/es/hack.md
+++ b/es/hack.md
@@ -5,7 +5,6 @@ contributors:
     - ["David Lima", "https://github.com/davelima"]
 translators:
     - ["César Suárez", "https://github.com/csuarez"]
-lang: es-es
 filename: learnhack-es.hh
 ---
 
diff --git a/es/haml.md b/es/haml.md
index b20df2eb..da3252f9 100644
--- a/es/haml.md
+++ b/es/haml.md
@@ -5,7 +5,6 @@ contributors:
   - ["Simon Neveu", "https://github.com/sneveu"]
 translators:
     - ["Camilo Garrido", "http://www.twitter.com/hirohope"]
-lang: es-es
 ---
 
 Haml es un lenguage de marcas principalmente usado con Ruby, que de forma simple y limpia describe el HTML de cualquier documento web sin el uso de código en linea. Es una alternativa popular respecto a usar el lenguage de plantilla de Rails (.erb) y te permite embeber código Ruby en tus anotaciones.
diff --git a/es/haskell.md b/es/haskell.md
index b3bb73d1..d08c91d1 100644
--- a/es/haskell.md
+++ b/es/haskell.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Jorge Antonio Atempa", "http://www.twitter.com/atempa09"]
 filename: haskell-es.hs
-lang: es-es
 ---
 
 Haskell fue diseñado como lenguaje de programación funcional práctico y puro. Es famoso por sus mónadas y su sistema de tipos, pero siempre regreso a él debido a su elegancia. Haskell hace la codificación una verdadera alegría para mí.
diff --git a/es/hq9+.md b/es/hq9+.md
index 91795d67..26461d01 100644
--- a/es/hq9+.md
+++ b/es/hq9+.md
@@ -5,7 +5,6 @@ contributors:
     - ["Alexey Nazaroff", "https://github.com/rogaven"]
 translators:
     - ["Roberto R", "https://github.com/rrodriguze"]
-lang: es-es
 ---
 
 HQ9+ es una parodia de los lenguajes de programación esotéricos y fue creado 
diff --git a/es/html.md b/es/html.md
index f7c028cf..dffcbd79 100644
--- a/es/html.md
+++ b/es/html.md
@@ -5,7 +5,6 @@ contributors:
     - ["Christophe THOMAS", "https://github.com/WinChris"]
 translators:
     - ["Gino Amaury", "https://github.com/ginoamaury"]
-lang: es-es
 ---
 
 HTML significa Lenguaje de marcado de hipertexto (HyperText Markup Language).
diff --git a/es/hy.md b/es/hy.md
index bba33497..7315707c 100644
--- a/es/hy.md
+++ b/es/hy.md
@@ -5,7 +5,6 @@ contributors:
     - ["Abhishek L", "http://twitter.com/abhishekl"]
 translators:
     - ["Roberto R", "https://github.com/rrodriguze"]
-lang: es-es
 ---
 
 Hy es un lenguaje de Lisp escrito sobre Python. Esto es posible convirtiendo
diff --git a/es/java.md b/es/java.md
index 668a6390..e4d84e7a 100644
--- a/es/java.md
+++ b/es/java.md
@@ -4,7 +4,6 @@ contributors:
     - ["Jake Prather", "http://github.com/JakeHP"]
 translators:
     - ["Camilo Garrido", "http://www.twitter.com/hirohope"]
-lang: es-es
 filename: LearnJava-es.java
 ---
 
diff --git a/es/javascript.md b/es/javascript.md
index bc4d5d81..c09eab0f 100644
--- a/es/javascript.md
+++ b/es/javascript.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Daniel Zendejas","https://github.com/DanielZendejas"]
 filename: javascript-es.js
-lang: es-es
 ---
 
 Tutorial de JavaScript en español.
diff --git a/es/jquery.md b/es/jquery.md
index 78a3d5c7..43d899da 100644
--- a/es/jquery.md
+++ b/es/jquery.md
@@ -5,7 +5,6 @@ contributors:
     - ["Sawyer Charles", "https://github.com/xssc"]
 translators:
     - ["Ivan Alburquerque", "https://github.com/AlburIvan"]
-lang: es-es
 filename: jquery-es.js
 ---
 
diff --git a/es/json.md b/es/json.md
index 6eaf5cb4..937de823 100644
--- a/es/json.md
+++ b/es/json.md
@@ -6,7 +6,6 @@ contributors:
   - ["Marco Scannadinari", "https://github.com/marcoms"]
 translators:
   - ["Daniel Zendejas","https://github.com/DanielZendejas"]
-lang: es-es
 ---
 
 Siendo JSON un formato de intercambio de infomación tan sencillo, probablemente este será el Learn X in Y más sencillo jamás.
diff --git a/es/julia.md b/es/julia.md
index a2572003..eaa6d131 100644
--- a/es/julia.md
+++ b/es/julia.md
@@ -6,7 +6,6 @@ translators:
     - ["Guillermo Garza", "http://github.com/ggarza"]
     - ["Ismael Venegas Castelló", "https://github.com/Ismael-VC"]
 filename: learnjulia-es.jl
-lang: es-es
 ---
 
 [Julia](https://julialang.org/) es un [lenguaje de programación](http://es.wikipedia.org/wiki/Lenguaje_de_programaci%C3%B3n) [multiplataforma](http://es.wikipedia.org/wiki/Multiplataforma) y [multiparadigma](http://es.wikipedia.org/wiki/Lenguaje_de_programaci%C3%B3n_multiparadigma) de [tipado dinámico](http://es.wikipedia.org/wiki/Tipado_din%C3%A1mico), [alto nivel](http://es.wikipedia.org/wiki/Lenguaje_de_alto_nivel) y [alto desempeño](http://es.wikipedia.org/wiki/Computaci%C3%B3n_de_alto_rendimiento) para la computación [genérica](http://es.wikipedia.org/wiki/Lenguaje_de_programaci%C3%B3n_de_prop%C3%B3sito_general), [técnica y científica](http://es.wikipedia.org/wiki/Computaci%C3%B3n_cient%C3%ADfica),  con una sintaxis que es familiar para los usuarios de otros entornos de computación técnica y científica. Provee de un [sofisticado compilador JIT](http://es.wikipedia.org/wiki/Compilaci%C3%B3n_en_tiempo_de_ejecuci%C3%B3n), [ejecución distribuida y paralela](http://docs.julialang.org/en/release-0.3/manual/parallel-computing), [precisión numérica](http://julia.readthedocs.org/en/latest/manual/integers-and-floating-point-numbers) y de una [extensa librería con funciones matemáticas](http://docs.julialang.org/en/release-0.3/stdlib). La librería estándar, escrita casi completamente en Julia, también integra las mejores y más maduras librerías de C y Fortran para el [álgebra lineal](http://docs.julialang.org/en/release-0.3/stdlib/linalg), [generación de números aleatorios](http://docs.julialang.org/en/release-0.3/stdlib/numbers/?highlight=random#random-numbers), [procesamiento de señales](http://docs.julialang.org/en/release-0.3/stdlib/math/?highlight=signal#signal-processing), y [procesamiento de cadenas](http://docs.julialang.org/en/release-0.3/stdlib/strings). Adicionalmente, la comunidad de [desarrolladores de Julia](https://github.com/JuliaLang/julia/graphs/contributors) contribuye un número de [paquetes externos](http://pkg.julialang.org) a través del gestor de paquetes integrado de Julia a un paso acelerado. [IJulia](https://github.com/JuliaLang/IJulia.jl), una colaboración entre las comunidades de [IPython](http://ipython.org) y Julia, provee de una poderosa interfaz gráfica basada en el [navegador para Julia](https://juliabox.org).
diff --git a/es/kotlin.md b/es/kotlin.md
index 6cbe81db..6abdb6a9 100644
--- a/es/kotlin.md
+++ b/es/kotlin.md
@@ -5,7 +5,6 @@ contributors:
 - ["Aitor Escolar", "https://github.com/aiescola"]
 translators:
 - ["Ivan Alburquerque", "https://github.com/AlburIvan"]
-lang: es-es
 filename: LearnKotlin-es.kt
 ---
 
diff --git a/es/lambda-calculus.md b/es/lambda-calculus.md
index 2465f7b1..83524193 100644
--- a/es/lambda-calculus.md
+++ b/es/lambda-calculus.md
@@ -6,7 +6,6 @@ contributors:
     - ["Yan Hui Hang", "http://github.com/yanhh0"]
 translators:
     - ["Ivan Alburquerque", "https://github.com/AlburIvan"]
-lang: es-es
 ---
 
 # Cálculo Lambda
diff --git a/es/latex.md b/es/latex.md
index 7d1ac39c..9c32b354 100644
--- a/es/latex.md
+++ b/es/latex.md
@@ -1,6 +1,5 @@
 ---
 language: LaTeX
-lang: es-es
 contributors:
     - ["Chaitanya Krishna Ande", "http://icymist.github.io"]
     - ["Colton Kohnke", "http://github.com/voltnor"]
diff --git a/es/less.md b/es/less.md
index e61d8716..8a59ed62 100644
--- a/es/less.md
+++ b/es/less.md
@@ -1,7 +1,6 @@
 ---
 language: Less
 filename: learnless-es.less
-lang: es-es
 contributors:
   - ["Saravanan Ganesh", "http://srrvnn.me"]
 translators:
diff --git a/es/livescript.md b/es/livescript.md
index 7a44b143..41a629c1 100644
--- a/es/livescript.md
+++ b/es/livescript.md
@@ -5,7 +5,6 @@ contributors:
     - ["Christina Whyte", "http://github.com/kurisuwhyte/"]
 translators:
     - ["Daniel Zendejas", "http://github.com/DanielZendejas/"]
-lang: es-es
 ---
 
 LiveScript es un lenguaje funcional compilado sobre JavaScript. Comparte
diff --git a/es/logtalk.md b/es/logtalk.md
index 0bf110ab..98ad4f92 100644
--- a/es/logtalk.md
+++ b/es/logtalk.md
@@ -4,7 +4,6 @@ filename: learnlogtalk.lgt
 contributors:
     - ["Paulo Moura", "http://github.com/pmoura"]
     - ["Adrián Arroyo Calle", "https://adrianistan.eu"]
-lang: es-es
 ---
 
 Logtalk nació en 1998 debido a los problemas de Prolog al escribir aplicaciones grandes. Diseñado por Paulo Moura, se trata de acercar Smalltalk y Prolog. De este modo el elemento fundamental de Logtalk serán los objetos, no las clases. A través de objetos podremos hacer clases si es lo que deseamos, o podemos usarlos como prototipos. Logtalk se ejecuta por encima de un sistema Prolog, sobre todo aquellos que implementen el estándar ISO Prolog. Actualmente Logtalk soporta: B-Prolog, Ciao Prolog, CxProlog, ECLiPSe, GNU Prolog, JIProlog, LVM, Quintus Prolog, Scryer Prolog, SICStus Prolog, SWI Prolog, Tau Prolog, Trealla Prolog, XSB y YAP. El código 100% Logtalk debería ser portable entre estos sistemas.
diff --git a/es/lua.md b/es/lua.md
index 05266d27..39a1ffbe 100644
--- a/es/lua.md
+++ b/es/lua.md
@@ -5,7 +5,6 @@ contributors:
     - ["Tyler Neylon", "http://tylerneylon.com/"]
 translators:
     - ["Jorge Diaz", "https://github.com/jorgeldb"]
-lang: es-es
 ---
 
 ```lua
diff --git a/es/make.md b/es/make.md
index 5eadc366..535689d5 100644
--- a/es/make.md
+++ b/es/make.md
@@ -7,7 +7,6 @@ contributors:
     - ["Stephan Fuhrmann", "https://github.com/sfuhrm"]
 translators:
     - ["Andrés Perdomo", "https://github.com/andres7293"]
-lang: es-es
 ---
 
 Un archivo Makefile define un conjunto de reglas para crear un objetivo (o
diff --git a/es/markdown.md b/es/markdown.md
index 77374541..22492a42 100644
--- a/es/markdown.md
+++ b/es/markdown.md
@@ -5,7 +5,6 @@ contributors:
     - ["Dan Turkel", "http://danturkel.com/"]
 translators:
     - ["Daniel Zendejas", "https://github.com/DanielZendejas"]
-lang: es-es
 ---
 
 Markdown fue creado por John Gruber en 2004. Su propósito es ser una sintaxis fácil de leer y escribir que se convierta
diff --git a/es/matlab.md b/es/matlab.md
index 2d1a1809..8a39d31b 100644
--- a/es/matlab.md
+++ b/es/matlab.md
@@ -8,7 +8,6 @@ contributors:
     - ["Claudson Martins", "http://github.com/claudsonm"]
 translators:
     - ["Ivan Alburquerque", "https://github.com/AlburIvan"]
-lang: es-es
 ---
 
 MATLAB significa 'MATrix LABoratory'. Es un poderoso lenguaje de computación numérica comúnmente usado en ingeniería y matemáticas.
diff --git a/es/objective-c.md b/es/objective-c.md
index a2eb33f7..9a71a579 100644
--- a/es/objective-c.md
+++ b/es/objective-c.md
@@ -6,7 +6,6 @@ contributors:
     - ["Levi Bostian", "https://github.com/levibostian"]
 translators:
     - ["David Hsieh", "http://github.com/deivuh"]
-lang: es-es
 filename: LearnObjectiveC-es.m
 ---
 Objective C es el lenguaje de programación principal utilizado por Apple para los sistemas operativos macOS y iOS y sus respectivos frameworks, Cocoa y Cocoa Touch.
diff --git a/es/pascal.md b/es/pascal.md
index 579358c0..0fa54057 100644
--- a/es/pascal.md
+++ b/es/pascal.md
@@ -6,7 +6,6 @@ contributors:
     - ["Keith Miyake", "https://github.com/kaymmm"]
 translators:
     - ["Ivan Alburquerque", "https://github.com/AlburIvan"]
-lang: es-es
 ---
 
 
diff --git a/es/pcre.md b/es/pcre.md
index 279c9a39..a52b5eac 100644
--- a/es/pcre.md
+++ b/es/pcre.md
@@ -5,7 +5,6 @@ contributors:
     - ["Sachin Divekar", "http://github.com/ssd532"]
 translators:
     - ["Roberto R", "https://github.com/rrodriguze"]
-lang: es-es
 ---
 
 Una expresión regular (regex o regexp para abreviar) es una cadena especial
diff --git a/es/perl.md b/es/perl.md
index bf252150..1df28f28 100644
--- a/es/perl.md
+++ b/es/perl.md
@@ -7,7 +7,6 @@ contributors:
 translators:
     - ["Francisco Gomez", "http://github.com/frncscgmz"]
     - ["Joaquín Ferrero", "http://github.com/joaquinferrero"]
-lang: es-es
 ---
 
 Perl es un lenguaje de programación altamente capaz, rico en características, con más de 25 años de desarrollo.
diff --git a/es/php-composer.md b/es/php-composer.md
index a471ade5..d5cd5e76 100644
--- a/es/php-composer.md
+++ b/es/php-composer.md
@@ -5,7 +5,6 @@ contributors:
     - ["Brett Taylor", "https://github.com/glutnix"]
 translators:
     - ["Ivan Alburquerque", "https://github.com/AlburIvan"]
-lang: es-es
 filename: LearnComposer-es.sh
 ---
 
diff --git a/es/php.md b/es/php.md
index ba07ed00..f146a050 100644
--- a/es/php.md
+++ b/es/php.md
@@ -5,7 +5,6 @@ contributors:
     - ["Trismegiste", "https://github.com/Trismegiste"]
 translators:
     - ["Mario Pérez", "https://github.com/MarioPerezEsteso"]
-lang: es-es
 filename: learnphp-es.php
 ---
 
diff --git a/es/powershell.md b/es/powershell.md
index ec292b6d..bd5c7952 100644
--- a/es/powershell.md
+++ b/es/powershell.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Alexander Salamanca", "https://github.com/alexitosrv"]
 filename: LearnPowershell-es.ps1
-lang: es-es
 ---
 
 PowerShell es el lenguaje de automatización y gestión de configuraciones de Windows hecho por Microsoft basado en .NET Framework. Desde Windows 7 en adelante, esos sistemas operativos incluyen un intérprete de PowerShell.
diff --git a/es/pyqt.md b/es/pyqt.md
index cbccd984..903e441f 100644
--- a/es/pyqt.md
+++ b/es/pyqt.md
@@ -6,7 +6,6 @@ contributors:
     - ["Nathan Hughes", "https://github.com/sirsharpest"]
 translators:
     - ["Adrian Rocamora", "https://github.com/adrianrocamora"]
-lang: es-es
 ---
 
 **Qt** es un sistema altamente reconocido que permite desarrollar software multiplataforma que puede correr en diferentes entornos de software y hardware con pocos o ningún cambio. Aun así conserva la velocidad y poder de una aplicación nativa. **Qt** fue originalmente escrito en *C++*.
diff --git a/es/python.md b/es/python.md
index f9786b39..27e469c4 100644
--- a/es/python.md
+++ b/es/python.md
@@ -4,7 +4,6 @@ contributors:
     - ["Louie Dinh", "http://pythonpracticeprojects.com"]
 translators:
     - ["Camilo Garrido", "http://twitter.com/hirohope"]
-lang: es-es
 filename: learnpython-es.py
 ---
 
diff --git a/es/pythonlegacy.md b/es/pythonlegacy.md
index 6efdc623..8b8ba901 100644
--- a/es/pythonlegacy.md
+++ b/es/pythonlegacy.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Camilo Garrido", "http://www.twitter.com/hirohope"]
     - ["Fabio Souto", "http://fabiosouto.me"]
-lang: es-es
 filename: learnpythonlegacy-es.py
 ---
 
diff --git a/es/pythonstatcomp.md b/es/pythonstatcomp.md
index 9b255ebd..49ecef13 100644
--- a/es/pythonstatcomp.md
+++ b/es/pythonstatcomp.md
@@ -6,7 +6,6 @@ contributors:
 filename: pythonstatcomp-es.py
 translators:
     - ["Damaso Sanoja", "https://github.com/damasosanoja"]
-lang: es-es
 ---
 
 Este es un tutorial de como realizar tareas típicas de programación estadística usando Python. Está destinado a personas con cierta familiaridad con Python y con experiencia en programación estadística en lenguajes como R, Stata, SAS, SPSS, or MATLAB.
diff --git a/es/r.md b/es/r.md
index 50c02e38..02531be3 100644
--- a/es/r.md
+++ b/es/r.md
@@ -5,7 +5,6 @@ contributors:
     - ["isomorphismes", "http://twitter.com/isomorphisms"]
 translators:
     - ["David Hsieh", "http://github.com/deivuh"]
-lang: es-es    
 filename: learnr-es.r
 ---
 
diff --git a/es/racket.md b/es/racket.md
index 41e4bc8f..a8ffbaef 100644
--- a/es/racket.md
+++ b/es/racket.md
@@ -9,7 +9,6 @@ contributors:
   - ["Keyan Zhang", "https://github.com/keyanzhang"]
 translators:
     - ["Carlos Roman", "https://github.com/carlochess"]
-lang: es-es
 ---
 Racket es un lenguaje de propósito general, multiparadigma que hace parte de la familia Lisp/Scheme.
 
diff --git a/es/raku.md b/es/raku.md
index 53ab2c76..8235adc9 100644
--- a/es/raku.md
+++ b/es/raku.md
@@ -7,7 +7,6 @@ contributors:
     - ["Samantha McVey", "https://cry.nu"]
 translators:
     - ["Luis F. Uceta", "https://github.com/uzluisf"]
-lang: es-es
 ---
 Raku es un lenguaje de programación altamente capaz y con características
 abundantes para hacerlo el lenguage ideal por los próximos 100 años.
diff --git a/es/rst.md b/es/rst.md
index 50492ed8..22a7415c 100644
--- a/es/rst.md
+++ b/es/rst.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Oscar Maestre", "http://www.github.com/OscarMaestre"]
 filename: restructuredtext-es.rst
-lang: es-es
 ---
 
 RST, de Restructured Text, es un formato de fichero creado por la comunidad Python para escribir documentación. Es parte del paquete [Docutils](https://docutils.sourceforge.io/rst.html).
diff --git a/es/ruby-ecosystem.md b/es/ruby-ecosystem.md
index 1caa5a06..768cf6ad 100644
--- a/es/ruby-ecosystem.md
+++ b/es/ruby-ecosystem.md
@@ -6,7 +6,6 @@ contributors:
     - ["Rafal Chmiel", "http://github.com/rafalchmiel"]
 translators:
     - ["Ale Mohamad", "http://twitter.com/alemohamad"]
-lang: es-es
 ---
 
 Las personas que usan Ruby en general tienen una tendencia a instalar diferentes
diff --git a/es/ruby.md b/es/ruby.md
index 37f84b99..eaf79563 100644
--- a/es/ruby.md
+++ b/es/ruby.md
@@ -17,7 +17,6 @@ contributors:
 translators:
     - ["Camilo Garrido", "http://www.twitter.com/hirohope"]
     - ["Erick Bernal", "http://www.twitter.com/billowkib"]
-lang: es-es
 ---
 
 ```ruby
diff --git a/es/rust.md b/es/rust.md
index d75a0b43..99b45594 100644
--- a/es/rust.md
+++ b/es/rust.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Razican", "https://www.razican.com/"]
 filename: learnrust-es.rs
-lang: es-es
 ---
 
 Rust es un lenguaje de programación desarrollado por Mozzilla Research. Rust
diff --git a/es/sass.md b/es/sass.md
index 4f29c170..630793bd 100644
--- a/es/sass.md
+++ b/es/sass.md
@@ -8,7 +8,6 @@ contributors:
   - ["Keith Miyake", "https://github.com/kaymmm"]
 translators:
   - ["César Suárez", "https://github.com/csuarez"]
-lang: es-es
 ---
 
 Sass es un lenguaje que extiende CSS y que añade características tales como variables, anidación, mixins y más. Sass (y otros preprocesadores tales como [Less](http://lesscess.org/)) ayudan a los desarrolladores a escribir código mantenible y DRY (Don't Repeat Yourself).
diff --git a/es/scala.md b/es/scala.md
index becb92dd..b657bde1 100644
--- a/es/scala.md
+++ b/es/scala.md
@@ -8,7 +8,6 @@ contributors:
     - ["Ha-Duong Nguyen", "http://reference-error.org"]
 translators:
     - ["Pablo Arranz Ropero", "http://arranzropablo.com"]
-lang: es-es
 ---
 
 Scala - El lenguaje escalable
diff --git a/es/self.md b/es/self.md
index 60dce875..456eb8e1 100644
--- a/es/self.md
+++ b/es/self.md
@@ -5,7 +5,6 @@ contributors:
 filename: learnself-es.self
 translators:
     - ["Damaso Sanoja", "https://github.com/damasosanoja"]
-lang: es-es
 ---
 
 Self es un lenguaje OO basado en prototipo rápido que corre en su propio vm JIT. La mayoría del desarrollo se hace a través de la interacción con objetos vivos en un entorno de desarrollo visual llamado *morphic* que tiene integrado navegador y depurador.
diff --git a/es/smallbasic.md b/es/smallbasic.md
index a0a80454..a3a0b008 100644
--- a/es/smallbasic.md
+++ b/es/smallbasic.md
@@ -5,7 +5,6 @@ contributors:
     - ["Chris Warren-Smith", "http://smallbasic.sourceforge.net"]
 translators:
     - ["José Juan Hernández García", "http://jjuanhdez.es"]
-lang: es-es
 ---
 
 ## Acerca de
diff --git a/es/sql.md b/es/sql.md
index 0d83ee93..ca513e6d 100644
--- a/es/sql.md
+++ b/es/sql.md
@@ -5,7 +5,6 @@ contributors:
   - ["Bob DuCharme", "http://bobdc.com/"]
 translators:
   - ["FedeHC", "https://github.com/FedeHC"]
-lang: es-es
 ---
 
 El lenguaje de consulta estructurada (SQL en inglés) es un lenguaje estándar ISO para crear y trabajar con bases de datos almacenados en un conjunto de tablas. Las implementaciones generalmente añaden sus propias extensiones al lenguaje; [Comparación entre diferentes implementaciones de SQL](http://troels.arvin.dk/db/rdbms/) es una buena referencia sobre las diferencias entre distintos productos.
diff --git a/es/swift.md b/es/swift.md
index 9f650411..3e2a9bcb 100644
--- a/es/swift.md
+++ b/es/swift.md
@@ -7,7 +7,6 @@ contributors:
   - ["Anthony Nguyen", "http://github.com/anthonyn60"]
 translators:
     - ["David Hsieh", "http://github.com/deivuh"]
-lang: es-es
 filename: learnswift-es.swift
 ---
 
diff --git a/es/tcl.md b/es/tcl.md
index f1835ef2..d626a2ea 100644
--- a/es/tcl.md
+++ b/es/tcl.md
@@ -4,7 +4,6 @@ contributors:
     - ["Poor Yorick", "https://pooryorick.com/"]
 translators:
     - ["Héctor Romojaro", "https://github.com/hromojaro"]
-lang: es-es
 filename: learntcl-es.tcl
 ---
 
diff --git a/es/tmux.md b/es/tmux.md
index f8baee6a..09deafd3 100644
--- a/es/tmux.md
+++ b/es/tmux.md
@@ -6,7 +6,6 @@ contributors:
 filename: LearnTmux-es.txt
 translators:
     - ["Damaso Sanoja", "https://github.com/damasosanoja"]
-lang: es-es
 ---
 
 [tmux](https://github.com/tmux/tmux)
diff --git a/es/typescript.md b/es/typescript.md
index c2f4e489..69886fe1 100644
--- a/es/typescript.md
+++ b/es/typescript.md
@@ -5,7 +5,6 @@ contributors:
 filename: learntypescript-es.ts
 translators:
     - ["Damaso Sanoja", "https://github.com/damasosanoja"]
-lang: es-es
 ---
 
 TypeScript es un lenguaje cuyo objetivo es facilitar el desarrollo de aplicaciones a gran escala escritas en JavaScript.
diff --git a/es/vim.md b/es/vim.md
index 67930843..d55bd770 100644
--- a/es/vim.md
+++ b/es/vim.md
@@ -5,7 +5,6 @@ contributors:
     - ["RadhikaG", "https://github.com/RadhikaG"]
 translators:
     - ["Ivan Alburquerque", "https://github.com/AlburIvan"]
-lang: es-es
 filename: LearnVim-es.txt
 ---
 
diff --git a/es/visualbasic.md b/es/visualbasic.md
index eead182c..80b88965 100644
--- a/es/visualbasic.md
+++ b/es/visualbasic.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Adolfo Jayme Barrientos", "https://github.com/fitojb"]
 filename: learnvisualbasic-es.vb
-lang: es-es
 ---
 
 ```vbnet
diff --git a/es/wolfram.md b/es/wolfram.md
index 587300dc..f945e734 100644
--- a/es/wolfram.md
+++ b/es/wolfram.md
@@ -1,6 +1,5 @@
 ---
 language: Wolfram
-lang: es-es
 contributors:
     - ["Daniel Caballero", "http://github.com/danielcaballero796/"]
 filename: learnwolfram-es.nb
diff --git a/es/xml.md b/es/xml.md
index f9260e41..58f9d109 100644
--- a/es/xml.md
+++ b/es/xml.md
@@ -5,7 +5,6 @@ contributors:
   - ["João Farias", "https://github.com/JoaoGFarias"]
 translators:
   - ["Daniel Zendejas", "https://github.com/DanielZendejas"]
-lang: es-es
 ---
 XML es un lenguaje diseñado para guardar y transportar datos
 
diff --git a/es/yaml.md b/es/yaml.md
index 40d1ba0b..e7ea1a9f 100644
--- a/es/yaml.md
+++ b/es/yaml.md
@@ -1,6 +1,5 @@
 ---
 language: YAML
-lang: es-es
 filename: learnyaml-es.yaml
 contributors:
   - ["Leigh Brenecki", "https://github.com/adambrenecki"]
diff --git a/fa/bf.md b/fa/bf.md
index 7e2669c8..6c4365ec 100644
--- a/fa/bf.md
+++ b/fa/bf.md
@@ -3,7 +3,6 @@ language: BF
 filename: bf-fa.bf
 contributors:
     - ["Mohammad Valipour", "https://github.com/mvalipour"]
-lang: fa-ir
 ---
 
 <p dir='rtl'>برین فاک زبان برنامه نویسی تورینگ کامل بی نهایت ساده ایست که دارای فقط هشت</p>
diff --git a/fa/css.md b/fa/css.md
index 6b8d4334..95d7e252 100644
--- a/fa/css.md
+++ b/fa/css.md
@@ -9,7 +9,6 @@ contributors:
     - ["Tyler Mumford", "https://tylermumford.com"]
 translators:
     - ["Arashk", "https://github.com/Arashk-A"]
-lang: fa-ir
 filename: learncss-fa.css
 ---
 
diff --git a/fa/html.md b/fa/html.md
index b4eb5246..c1ff2686 100644
--- a/fa/html.md
+++ b/fa/html.md
@@ -5,7 +5,6 @@ contributors:
   - ["Christophe THOMAS", "https://github.com/WinChris"]
 translators:
   - ["Hiva Zarei", "https://github.com/hivazarei"]
-lang: fa-ir
 ---
 
 <p dir="rtl">HTML مخفف كلمه ی Hyper Text Markup Language می باشد.</p>
diff --git a/fa/javascript.md b/fa/javascript.md
index a6300865..69bef301 100644
--- a/fa/javascript.md
+++ b/fa/javascript.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Mohammad Valipour", "https://github.com/mvalipour"]
 filename: javascript-fa.js
-lang: fa-ir
 ---
 
 <p dir='rtl'>
diff --git a/fa/vim.md b/fa/vim.md
index c50589f0..70d022b6 100644
--- a/fa/vim.md
+++ b/fa/vim.md
@@ -5,7 +5,6 @@ contributors:
     - ["RadhikaG", "https://github.com/RadhikaG"]
 translators:
     - ["Moein Halvaei", "https://github.com/mo1ein"]
-lang: fa-ir
 filename: LearnVim-fa.txt
 ---
 
diff --git a/fi/go.md b/fi/go.md
index f1ef1f47..57fb3d24 100644
--- a/fi/go.md
+++ b/fi/go.md
@@ -12,7 +12,6 @@ contributors:
     - ["Clayton Walker", "https://github.com/cwalk"]
 translators:
     - ["Timo Virkkunen", "https://github.com/ComSecNinja"]
-lang: fi-fi
 ---
 
 Go luotiin työn tekemistä varten. Se ei ole tietojenkäsittelyn uusin trendi,
diff --git a/fi/markdown.md b/fi/markdown.md
index 8c5cd45a..fc398c41 100644
--- a/fi/markdown.md
+++ b/fi/markdown.md
@@ -5,7 +5,6 @@ contributors:
     - ["Dan Turkel", "http://danturkel.com/"]
 translators:
     - ["Timo Virkkunen", "https://github.com/ComSecNinja"]
-lang: fi-fi
 ---
 
 John Gruber loi Markdownin vuona 2004. Sen tarkoitus on olla helposti luettava ja kirjoitettava syntaksi joka muuntuu helposti HTML:ksi (ja nyt myös moneksi muuksi formaatiksi).
diff --git a/fi/ruby.md b/fi/ruby.md
index 17700e50..a9143e11 100644
--- a/fi/ruby.md
+++ b/fi/ruby.md
@@ -17,7 +17,6 @@ contributors:
   - ["Jake Faris", "https://github.com/farisj"]
 translators:
   - ["Oliver Vartiainen", "https://github.com/firoxer"]
-lang: fi-fi
 ---
 
 ```ruby
diff --git a/fr/asymptotic-notation.md b/fr/asymptotic-notation.md
index fb0a8220..b4f29451 100644
--- a/fr/asymptotic-notation.md
+++ b/fr/asymptotic-notation.md
@@ -6,7 +6,6 @@ contributors:
     - ["Divay Prakash", "http://github.com/divayprakash"]
 translators:
     - ["Agathe Begault", "https://github.com/begault"]
-lang: fr-fr    
 ---
 
 # Notations Asymptotiques
diff --git a/fr/awk.md b/fr/awk.md
index 9043c8aa..e9c9df1b 100644
--- a/fr/awk.md
+++ b/fr/awk.md
@@ -6,7 +6,6 @@ contributors:
      - ["Marshall Mason", "http://github.com/marshallmason"]
 translators:
     - ["GannonTdW", "https://github.com/GannonTdW"]
-lang: fr-fr
 
 ---
 
diff --git a/fr/bash.md b/fr/bash.md
index 4f5419ce..bae3ecc6 100644
--- a/fr/bash.md
+++ b/fr/bash.md
@@ -12,7 +12,6 @@ contributors:
 translators:
     - ["Baptiste Fontaine", "http://bfontaine.net"]
 filename: LearnBash-fr.sh
-lang: fr-fr
 ---
 
 Bash est le nom du shell UNIX, qui était aussi distribué avec le système
diff --git a/fr/bf.md b/fr/bf.md
index 4551ae41..f7f97181 100644
--- a/fr/bf.md
+++ b/fr/bf.md
@@ -6,7 +6,6 @@ contributors:
     - ["Mathias Bynens", "http://mathiasbynens.be/"]
 translators:
     - ["Baptiste Fontaine", "http://bfontaine.net"]
-lang: fr-fr
 ---
 
 Brainfuck (sans majuscule à part au début d’une phrase) est un langage
diff --git a/fr/c++.md b/fr/c++.md
index da2b8ec5..50eb7e13 100644
--- a/fr/c++.md
+++ b/fr/c++.md
@@ -8,7 +8,6 @@ contributors:
     - ["Connor Waters", "http://github.com/connorwaters"]
 translators:
     - ["Xuan-thi Nguyen", "http://github.com/mellenguyen"]
-lang: fr-fr
 ---
 
 C++ est un langage de programmation système qui,
diff --git a/fr/c.md b/fr/c.md
index 78b9dbcc..ab0c65cf 100644
--- a/fr/c.md
+++ b/fr/c.md
@@ -13,7 +13,6 @@ contributors:
     - ["Heitor P. de Bittencourt", "https://github.com/heitorPB/"]
 translators:
     - ["Cyril Jovet", "https://twitter.com/CyrilJovet"]
-lang: fr-fr
 ---
 
 Le C est le langage de plus bas niveau que la plupart des programmeurs seront
diff --git a/fr/clojure.md b/fr/clojure.md
index 34b7eaae..ba1d40b4 100644
--- a/fr/clojure.md
+++ b/fr/clojure.md
@@ -5,7 +5,6 @@ contributors:
     - ["Adam Bard", "http://adambard.com/"]
 translators:
     - ["Bastien Guerry", "https://github.com/bzg"]
-lang: fr-fr
 ---
 
 Clojure est un langage de la famille des Lisp développé pour la machine
diff --git a/fr/coffeescript.md b/fr/coffeescript.md
index 926c0a84..904b2492 100644
--- a/fr/coffeescript.md
+++ b/fr/coffeescript.md
@@ -4,7 +4,6 @@ contributors:
   - ["Tenor Biel", "http://github.com/L8D"]
 translators:
   - ["Geoffrey Roguelon", "https://github.com/GRoguelon"]
-lang: fr-fr
 filename: coffeescript-fr.coffee
 ---
 
diff --git a/fr/crystal.md b/fr/crystal.md
index 6629ca1f..b714e8a2 100644
--- a/fr/crystal.md
+++ b/fr/crystal.md
@@ -6,7 +6,6 @@ contributors:
     - ["Arnaud Fernandés", "https://github.com/TechMagister/"]
 translators:
     - ["Arnaud Fernandés", "http://github.com/TechMagister/"]
-lang: fr-fr
 ---
 
 ```crystal
diff --git a/fr/csharp.md b/fr/csharp.md
index b3bf9c3b..54ba0dd1 100644
--- a/fr/csharp.md
+++ b/fr/csharp.md
@@ -8,7 +8,6 @@ contributors:
 translators:
     - ["Olivier Hoarau", "https://github.com/Olwaro"]
 filename: LearnCSharp-fr.cs
-lang: fr-fr
 ---
 
 C# est un langage de programmation orienté objet à typage fort qui permet aux développeurs de créer une grande variété d'applications fiables et robustes s'appuyant sur le framework .NET.
diff --git a/fr/css.md b/fr/css.md
index 7dd6350a..d777250d 100644
--- a/fr/css.md
+++ b/fr/css.md
@@ -6,7 +6,6 @@ contributors:
     - ["Marco Scannadinari", "https://github.com/marcoms"]
 translators:
     - ["@prrrnd", "https://github.com/prrrnd"]
-lang: fr-fr
 ---
 
 Au début du web, il n'y avait pas d'élements visuels, simplement du texte pur. Mais avec le dévelopement des navigateurs,
diff --git a/fr/d.md b/fr/d.md
index e593fdbd..794cf58d 100644
--- a/fr/d.md
+++ b/fr/d.md
@@ -5,7 +5,6 @@ contributors:
     - ["Nick Papanastasiou", "www.nickpapanastasiou.github.io"]
 translators:
     - ["Quentin Ladeveze", "aceawan.eu"]
-lang: fr-fr
 ---
 
 ```d
diff --git a/fr/dynamic-programming.md b/fr/dynamic-programming.md
index ea547dae..dd6603d6 100644
--- a/fr/dynamic-programming.md
+++ b/fr/dynamic-programming.md
@@ -5,7 +5,6 @@ contributors:
     - ["Akashdeep Goel", "http://github.com/akashdeepgoel"]
 translators:
     - ["Hughes Perreault", "https://github.com/hperreault"]
-lang: fr-fr
 ---
 
 # Programmation dynamique
diff --git a/fr/elisp.md b/fr/elisp.md
index 4f5923ba..e333af98 100644
--- a/fr/elisp.md
+++ b/fr/elisp.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Bastien Guerry", "https://bzg.fr"]
 filename: learn-emacs-lisp-fr.el
-lang: fr-fr
 ---
 
 ```scheme
diff --git a/fr/elixir.md b/fr/elixir.md
index b38afda2..65562fef 100644
--- a/fr/elixir.md
+++ b/fr/elixir.md
@@ -8,7 +8,6 @@ contributors:
 translator:
     - ["Timothé Pardieu", "https://github.com/timprd"]
 filename: learnelixir-fr.ex
-lang: fr-fr
 ---
 Elixir est un langage de programmation fonctionnel moderne reposant sur la machine virtuelle BEAM, qui héberge aussi Erlang.
 Il est totalement compatible avec Erlang mais dispose d'une syntaxe plus agréable et apporte de nouvelles fonctionnalités.
diff --git a/fr/erlang.md b/fr/erlang.md
index 1d4564d2..de108229 100644
--- a/fr/erlang.md
+++ b/fr/erlang.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Julien Cretel", "https://github.com/Jubobs"]
 filename: learnerlang-fr.erl
-lang: fr-fr
 ---
 
 ```erlang
diff --git a/fr/fsharp.md b/fr/fsharp.md
index b77eda59..00896272 100644
--- a/fr/fsharp.md
+++ b/fr/fsharp.md
@@ -1,6 +1,5 @@
 ---
 language: F#
-lang: fr-fr
 contributors:
     - ["Scott Wlaschin", "http://fsharpforfunandprofit.com/"]
 translators:
diff --git a/fr/git.md b/fr/git.md
index c6054e89..9145e716 100644
--- a/fr/git.md
+++ b/fr/git.md
@@ -9,7 +9,6 @@ contributors:
 translators:
     - ["Xuan-thi Nguyen", "http://github.com/mellenguyen"]
 filename: LearnGit-fr.txt
-lang: fr-fr
 ---
 
 Git est un logiciel de contrôle de versions distribué et un système de gestion
diff --git a/fr/go.md b/fr/go.md
index 6f898c73..bc231593 100644
--- a/fr/go.md
+++ b/fr/go.md
@@ -1,7 +1,6 @@
 ---
 category: language
 language: Go
-lang: fr-fr
 filename: learngo-fr.go
 contributors:
     - ["Sonia Keys", "https://github.com/soniakeys"]
diff --git a/fr/haml.md b/fr/haml.md
index ae45ecb9..aa2c4127 100644
--- a/fr/haml.md
+++ b/fr/haml.md
@@ -4,7 +4,6 @@ filename: learnhaml-fr.haml
 contributors:
   - ["Simon Neveu", "https://github.com/sneveu"]
   - ["Thibault", "https://github.com/iTech-"]
-lang: fr-fr
 ---
 
 Haml est un langage de balisage utilisé majoritairement avec Ruby, qui décrit de manière simple et propre le HTML de n'importe quelle page web sans l'utilisation des traditionnelles lignes de code. Le langage est une alternative très populaire au langage de templates Rails (.erb) et permet d'intégrer du code en Ruby dans votre balisage.
diff --git a/fr/haskell.md b/fr/haskell.md
index 56565cef..29657f6e 100644
--- a/fr/haskell.md
+++ b/fr/haskell.md
@@ -4,7 +4,6 @@ contributors:
     - ["Adit Bhargava", "http://adit.io"]
 translators:
     - ["David Baumgartner", "http://davidbaumgartner.ch"]    
-lang: fr-fr
 filename: learnhaskell-fr.hs
 ---
 
diff --git a/fr/html.md b/fr/html.md
index 7d5a5a28..a36be975 100644
--- a/fr/html.md
+++ b/fr/html.md
@@ -3,7 +3,6 @@ language: HTML
 filename: learnhtml-fr.txt
 contributors:
     - ["Christophe THOMAS", "https://github.com/WinChris"]
-lang: fr-fr
 ---
 
 HTML signifie HyperText Markup Language. 
diff --git a/fr/hy.md b/fr/hy.md
index 8ba55e14..99aef046 100644
--- a/fr/hy.md
+++ b/fr/hy.md
@@ -5,7 +5,6 @@ contributors:
     - ["Abhishek L", "http://twitter.com/abhishekl"]
 translators:
   - ["Hughes Perreault", "https://github.com/hperreault"]
-lang: fr-fr
 ---
 
 Hy est un dialecte du Lisp bâti par dessus Python. Il fonctionne en
diff --git a/fr/java.md b/fr/java.md
index 471f0a8e..d11258a2 100644
--- a/fr/java.md
+++ b/fr/java.md
@@ -14,7 +14,6 @@ contributors:
 filename: java-fr.java
 translators:
     - ['Mathieu Gemard', 'https://github.com/mgemard']
-lang: fr-fr
 ---
 Java est un langage orienté objet, concurrent et très facilement portable. Java
 est inspiré du C++ mais ne reprend pas tous les concepts comme par exemple les
diff --git a/fr/javascript.md b/fr/javascript.md
index 2e70b8ed..fe0e1f07 100644
--- a/fr/javascript.md
+++ b/fr/javascript.md
@@ -7,7 +7,6 @@ filename: javascript-fr.js
 translators:
     - ["@nbrugneaux", "https://nicolasbrugneaux.me"]
     - ["Michel Antoine", "https://github.com/antoin-m"]
-lang: fr-fr
 ---
 
 JavaScript a été créé par Brendan Eich, travaillant alors a Netscape, en 1995.
diff --git a/fr/jquery.md b/fr/jquery.md
index 693e1d93..f53c0f5c 100644
--- a/fr/jquery.md
+++ b/fr/jquery.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Sylvain Vaure", "https://github.com/Gnomino"]
 filename: jquery-fr.js
-lang: fr-fr
 ---
 
 jQuery est une bibliothèque JavaScript dont le but est de permettre de "faire plus en écrivant moins" (do more, write less). Elle facilite l'écriture de nombreuses fonctions, notamment au niveau d'AJAX, de la gestion d'événements, ou encore de la manipulation de documents. 
diff --git a/fr/json.md b/fr/json.md
index 272cb926..3ea49807 100644
--- a/fr/json.md
+++ b/fr/json.md
@@ -6,7 +6,6 @@ contributors:
   - ["Marco Scannadinari", "https://github.com/marcoms"]
 translators:
   - ["Alois de Gouvello","https://github.com/aloisdg"]
-lang: fr-fr
 ---
 
 Comme JSON est un format d'échange de données extrêmement simple, ce Apprendre X en Y minutes
diff --git a/fr/kotlin.md b/fr/kotlin.md
index fc8570da..bcf05e69 100644
--- a/fr/kotlin.md
+++ b/fr/kotlin.md
@@ -1,7 +1,6 @@
 ---
 language: Kotlin
 filename: LearnKotlin-fr.kt
-lang: fr-fr
 contributors:
     - ["S Webber", "https://github.com/s-webber"]
 translators:
diff --git a/fr/lambda-calculus.md b/fr/lambda-calculus.md
index c91f21d6..98a28639 100644
--- a/fr/lambda-calculus.md
+++ b/fr/lambda-calculus.md
@@ -5,7 +5,6 @@ contributors:
     - ["Max Sun", "http://github.com/maxsun"]
 translators:
     - ["Yvan Sraka", "https://github.com/yvan-sraka"]
-lang: fr-fr
 ---
 
 # Lambda-calcul
diff --git a/fr/livescript.md b/fr/livescript.md
index 033de4d8..5f444b25 100644
--- a/fr/livescript.md
+++ b/fr/livescript.md
@@ -5,7 +5,6 @@ contributors:
     - ["Christina Whyte", "http://github.com/kurisuwhyte/"]
 translators:
     - ["Morgan Bohn", "https://github.com/dotmobo"]
-lang: fr-fr
 ---
 
 LiveScript est un langage qui compile en JavaScript. Il a un rapport direct 
diff --git a/fr/lua.md b/fr/lua.md
index b6d1c8ea..aa9c20a7 100644
--- a/fr/lua.md
+++ b/fr/lua.md
@@ -5,7 +5,6 @@ contributors:
     - ["Tyler Neylon", "http://tylerneylon.com/"]
 translators:
     - ["Roland Yonaba", "http://github.com/Yonaba"]
-lang: fr-fr
 ---
 
 ```lua
diff --git a/fr/make.md b/fr/make.md
index aa26ed6d..dfffb3e8 100644
--- a/fr/make.md
+++ b/fr/make.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["altaris", "https://github.com/altaris"]
 filename: Makefile-fr
-lang: fr-fr
 ---
 
 Un makefile est un fichier qui définit un ensemble de règles liées entre elles
diff --git a/fr/markdown.md b/fr/markdown.md
index 43c18bcc..853b24cc 100644
--- a/fr/markdown.md
+++ b/fr/markdown.md
@@ -3,7 +3,6 @@ language: Markdown
 contributors:
 - ["Andrei Curelaru", "http://www.infinidad.fr"]
 filename: markdown-fr.md
-lang: fr-fr
 ---
 
 Markdown a été créé par John Gruber en 2004. Il se veut être d'une syntaxe
diff --git a/fr/nix.md b/fr/nix.md
index 7b9e3774..a52bdfc0 100644
--- a/fr/nix.md
+++ b/fr/nix.md
@@ -7,7 +7,6 @@ contributors:
     - ["Javier Candeira", "https://candeira.com/"]
 translators:
     - ["Loïc Reynier", "https://github.com/loicreynier"]
-lang: fr-fr
 ---
 
 Nix est un langage fonctionnel développé pour
diff --git a/fr/objective-c.md b/fr/objective-c.md
index 17a3a815..f7d29cac 100644
--- a/fr/objective-c.md
+++ b/fr/objective-c.md
@@ -7,7 +7,6 @@ contributors:
 translators:
     - ["Yannick Loriot", "https://github.com/YannickL"]
 filename: LearnObjectiveC-fr.m
-lang: fr-fr
 ---
 
 L'Objective-C est un langage de programmation orienté objet réflexif principalement utilisé par Apple pour les systèmes d'exploitations macOS et iOS et leurs frameworks respectifs, Cocoa et Cocoa Touch.
diff --git a/fr/pcre.md b/fr/pcre.md
index e12b4cde..5b382e0d 100644
--- a/fr/pcre.md
+++ b/fr/pcre.md
@@ -5,7 +5,6 @@ contributors:
     - ["Sachin Divekar", "http://github.com/ssd532"]
 translators:
     - ["Th3G33k", "https://github.com/Th3G33k"]
-lang: fr-fr
 
 ---
 
diff --git a/fr/perl.md b/fr/perl.md
index 1d6858bf..0fdf64ff 100644
--- a/fr/perl.md
+++ b/fr/perl.md
@@ -7,7 +7,6 @@ contributors:
     - ["Matteo Taroli", "http://www.matteotaroli.be"]
 translators:
     - ["Matteo Taroli", "http://www.matteotaroli.be"]
-lang: fr-fr
 ---
 Perl est un langage de programmation riche en fonctionnalité, avec plus de 25 ans de développement.
 
diff --git a/fr/php.md b/fr/php.md
index ef0b0ef2..260841a9 100644
--- a/fr/php.md
+++ b/fr/php.md
@@ -7,7 +7,6 @@ contributors:
 translators:
     - ["Pascal Boutin", "http://pboutin.net/"]
     - ["Julien M'Poy", "https://github.com/groovytron"]
-lang: fr-fr
 ---
 
 Ce document décrit PHP 5+.
diff --git a/fr/pyqt.md b/fr/pyqt.md
index e6b3dc48..db266ed9 100644
--- a/fr/pyqt.md
+++ b/fr/pyqt.md
@@ -6,7 +6,6 @@ contributors:
     - ["Nathan Hughes", "https://github.com/sirsharpest"]
 translators:
     - ["DevHugo", "http://twitter.com/devhugo"]
-lang: fr-fr
 ---
 
 **Qt** est un framework très connu pour le développement de logiciel cross-platform qui peuvent être lancé sur différents systèmes avec de petit ou aucun changement dans le code, tout en ayant la puissance et la vitesse des applications natives. Bien que **Qt** ait été écrit à l'origine en *C++*.
diff --git a/fr/python.md b/fr/python.md
index 15abab4d..1df50894 100644
--- a/fr/python.md
+++ b/fr/python.md
@@ -9,7 +9,6 @@ translators:
     - ["Gnomino", "https://github.com/Gnomino"]
     - ["Julien M'Poy", "http://github.com/groovytron"]
 filename: learnpython-fr.py
-lang: fr-fr
 ---
 
 Python a été créé par Guido Van Rossum au début des années 90. C'est maintenant un des 
diff --git a/fr/pythonlegacy.md b/fr/pythonlegacy.md
index 4dce2623..15691238 100644
--- a/fr/pythonlegacy.md
+++ b/fr/pythonlegacy.md
@@ -6,7 +6,6 @@ contributors:
 translators:
   - ["Sylvain Zyssman", "https://github.com/sylzys"]
   - ["Nami-Doc", "https://github.com/Nami-Doc"]
-lang: fr-fr
 ---
 
 Python a été créé par Guido Van Rossum au début des années 90. C'est maintenant un des langages de programmation les plus populaires.
diff --git a/fr/r.md b/fr/r.md
index 4e8a6de7..40773c4e 100644
--- a/fr/r.md
+++ b/fr/r.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Anne-Catherine Dehier", "https://github.com/spellart"]
 filename: learnr-fr.r
-lang: fr-fr
 ---
 
 R est un langage de programmation statistique. Il dispose de nombreuses
diff --git a/fr/racket.md b/fr/racket.md
index 3f81bee1..8c56f60c 100644
--- a/fr/racket.md
+++ b/fr/racket.md
@@ -7,7 +7,6 @@ contributors:
   - ["Gustavo Schmidt", "https://github.com/gustavoschmidt"]
 translators:
   - ["Xavier Nayrac", "https://github.com/lkdjiin"]
-lang: fr-fr
 ---
 
 Racket est un langage de programmation généraliste, multi-paradigme,
diff --git a/fr/ruby-ecosystem.md b/fr/ruby-ecosystem.md
index ea62ff3a..3520ee91 100644
--- a/fr/ruby-ecosystem.md
+++ b/fr/ruby-ecosystem.md
@@ -7,7 +7,6 @@ contributors:
 translators:
     - ["Xuan-thi Nguyen", "http://github.com/mellenguyen"]
     - ["Sylvain Abélard", "http://github.com/abelards"]
-lang: fr-fr
 
 ---
 
diff --git a/fr/ruby.md b/fr/ruby.md
index 270f6551..c183f4e8 100644
--- a/fr/ruby.md
+++ b/fr/ruby.md
@@ -12,7 +12,6 @@ translators:
   - ["Geoffrey Roguelon", "https://github.com/GRoguelon"]
   - ["Nami-Doc", "https://github.com/Nami-Doc"]
   - ["Sylvain Abélard", "http://github.com/abelards"]
-lang: fr-fr
 ---
 
 ```ruby
diff --git a/fr/rust.md b/fr/rust.md
index 6fc0d07d..b576821c 100644
--- a/fr/rust.md
+++ b/fr/rust.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Ryan Rembert", "http://jrrembert.github.io"]
 filename: learnrust-fr.rs
-lang: fr-fr
 ---
 
 Rust est un langage de programmation développé par Mozilla Research. Rust combine le contrôle de bas niveau sur la performance avec la commodité et la sécurité garanties de haut niveau.
diff --git a/fr/scala.md b/fr/scala.md
index 10066b95..c3c135bb 100644
--- a/fr/scala.md
+++ b/fr/scala.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Anne-Catherine Dehier", "https://github.com/spellart"]
 filename: learnscala-fr.scala
-lang: fr-fr
 ---
 
 ### Scala - le langage évolutif
diff --git a/fr/set-theory.md b/fr/set-theory.md
index d1ac2711..3825e4a2 100644
--- a/fr/set-theory.md
+++ b/fr/set-theory.md
@@ -1,7 +1,6 @@
 ---
 category: Algorithms & Data Structures
 name: Set theory
-lang: fr-fr
 contributors: 
   - ["kieutrang", "https://github.com/kieutrang1729"]
 ---
diff --git a/fr/sql.md b/fr/sql.md
index a7021d1f..2c2f3a82 100644
--- a/fr/sql.md
+++ b/fr/sql.md
@@ -5,7 +5,6 @@ contributors:
   - ["Bob DuCharme", "http://bobdc.com/"]
 translators:
   - ["Th3G33k", "https://github.com/Th3G33k"]
-lang: fr-fr
 ---
 
 Le Structured Query Language (SQL) est un langage standard [ISO/IEC 9075](https://www.iso.org/standard/63555.html) permettant de créer et d'utiliser des bases de données. Les implémentations (MySQL, PostgreSQL, Oracle etc.) ajoutent généralement leurs propres extensions au langage ([Comparaison des différentes implémentations SQL](http://troels.arvin.dk/db/rdbms/)).
diff --git a/fr/tmux.md b/fr/tmux.md
index 50704239..53dd2a23 100644
--- a/fr/tmux.md
+++ b/fr/tmux.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Xuan-thi Nguyen", "https://github.com/mellenguyen"]
 filename: LearnTmux-fr.txt
-lang: fr-fr
 ---
 
 
diff --git a/fr/typescript.md b/fr/typescript.md
index d0498e88..501c8f8d 100644
--- a/fr/typescript.md
+++ b/fr/typescript.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Alois de Gouvello", "https://github.com/aloisdg"]
 filename: learntypescript-fr.ts
-lang: fr-fr
 ---
 
 TypeScript est un langage visant à faciliter le développement d'applications larges et scalables, écrites en JavaScript.
diff --git a/fr/vim.md b/fr/vim.md
index 7cf08b52..f3f7e0fa 100644
--- a/fr/vim.md
+++ b/fr/vim.md
@@ -6,7 +6,6 @@ contributors:
     - ["RadhikaG", "https://github.com/RadhikaG"]
 translators:
     - ["Thibault", "https://github.com/napnac"]
-lang: fr-fr
 ---
 
 
diff --git a/fr/wolfram.md b/fr/wolfram.md
index 678ad573..9f2b4550 100644
--- a/fr/wolfram.md
+++ b/fr/wolfram.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["altaris", "http://github.com/altaris/"]
 filename: learnwolfram-fr.nb
-lang: fr-fr
 ---
 
 Le langage Wolfram est utilisé dans les programmes suivants :
diff --git a/fr/xml.md b/fr/xml.md
index cfdfae78..f6cd963a 100644
--- a/fr/xml.md
+++ b/fr/xml.md
@@ -5,7 +5,6 @@ contributors:
 translators:
   - ["Geoffrey Liu", "https://github.com/g-liu"]
 filename: learnxml-fr.xml
-lang: fr-fr
 ---
 
 XML est un langage de balisage conçu pour stocker et transporter les informations.
diff --git a/fr/yaml.md b/fr/yaml.md
index bc967039..e6ac6778 100644
--- a/fr/yaml.md
+++ b/fr/yaml.md
@@ -3,7 +3,6 @@ language: YAML
 filename: learnyaml-fr.yaml
 contributors:
   - ["Andrei Curelaru", "http://www.infinidad.fr"]
-lang: fr-fr
 ---
 
 Proposé à l'origine par Clark Evans en Mai 2001, YAML est un un format de 
diff --git a/he/html.md b/he/html.md
index a801905d..6a2196c6 100644
--- a/he/html.md
+++ b/he/html.md
@@ -5,7 +5,6 @@ contributors:
     - ['Christophe THOMAS', 'https://github.com/WinChris']
 translators:
     - ['Menachem Zeivald', 'https://github.com/MenachemZeivald']
-lang: he-he
 ---
 
 HTML קיצור של Hypertext Markup Language כלומר זוהי שפה שמשתמשת בתגיות.
diff --git a/hi/amd.md b/hi/amd.md
index a92ed568..80785608 100644
--- a/hi/amd.md
+++ b/hi/amd.md
@@ -4,7 +4,6 @@ tool: AMD
 contributors:
     - ["Frederik Ring", "https://github.com/m90"]
 filename: learnamd-hd.js
-lang: hi-in
 ---
 ## एएमडी के साथ प्रारंभ करना
 
diff --git a/hi/c++.md b/hi/c++.md
index 504f3fd4..7fd90878 100644
--- a/hi/c++.md
+++ b/hi/c++.md
@@ -10,7 +10,6 @@ contributors:
     - ["Jatin Dhankhar", "https://github.com/jatindhankhar"]
 translators:
     - ["Jishan Shaikh", "https://github.com/jishanshaikh4"]
-lang: hi-in
 ---
 
 C++ एक सिस्टम प्रोग्रामिंग लैंग्वेज है जो,
diff --git a/hi/d.md b/hi/d.md
index b410b7fd..c7141b1d 100644
--- a/hi/d.md
+++ b/hi/d.md
@@ -3,7 +3,6 @@ language: D
 filename: learnd-hd.d
 contributors:
     - ["Nick Papanastasiou", "www.nickpapanastasiou.github.io"]
-lang: hi-in
 ---
 
 ```d
diff --git a/hi/json.md b/hi/json.md
index 95a8329b..cb17557b 100644
--- a/hi/json.md
+++ b/hi/json.md
@@ -8,7 +8,6 @@ contributors:
   - ["Athanasios Emmanouilidis", "https://github.com/athanasiosem"]
 translators:
     - ["Namami Shanker", "https://github.com/NamamiShanker"]
-lang: hi-in
 ---
 
 जैसन(JSON) इस अत्यंत सरल डाटा-इंटरचेंज फॉर्मेट है| जैसा [json.org](https://json.org) कहती है, ये इंसानो के पढ़ने और लिखने के लिए भी आसान है और और मशीन के लिए इसे पार्स और उतपन्न करना भी बेहद सरल है|
diff --git a/hjson.md b/hjson.md
index e778dabb..328b46e7 100644
--- a/hjson.md
+++ b/hjson.md
@@ -3,7 +3,6 @@ language: Hjson
 filename: learnhjson.hjson
 contributors:
   - ["MrTeferi", "https://github.com/MrTeferi"]
-lang: en-us
 ---
 
 Hjson is an attempt to make [JSON](https://learnxinyminutes.com/docs/json/) more human readable.
diff --git a/hu/coffeescript.md b/hu/coffeescript.md
index 6168ed5a..bbdb7740 100644
--- a/hu/coffeescript.md
+++ b/hu/coffeescript.md
@@ -5,7 +5,6 @@ contributors:
   - ["Xavier Yao", "http://github.com/xavieryao"]
 translators:
   - ["Tamás Diószegi", "http://github.com/ditam"]
-lang: hu-hu
 filename: coffeescript-hu.coffee
 ---
 
diff --git a/hu/go.md b/hu/go.md
index 451f9147..8386563d 100644
--- a/hu/go.md
+++ b/hu/go.md
@@ -1,6 +1,5 @@
 ---
 language: Go
-lang: hu-hu
 filename: learngo-hu.go
 contributors:
     - ["Sonia Keys", "https://github.com/soniakeys"]
diff --git a/hu/pythonlegacy.md b/hu/pythonlegacy.md
index 4133b608..3b90797a 100644
--- a/hu/pythonlegacy.md
+++ b/hu/pythonlegacy.md
@@ -10,7 +10,6 @@ contributors:
 translators:
     - ["Tamás Diószegi", "https://github.com/ditam"]
 filename: learnpythonlegacy-hu.py
-lang: hu-hu
 ---
 
 A Python nyelvet Guido Van Rossum alkotta meg a 90-es évek elején. Manapság az
diff --git a/hu/ruby.md b/hu/ruby.md
index ca86c98e..9716fda0 100644
--- a/hu/ruby.md
+++ b/hu/ruby.md
@@ -1,6 +1,5 @@
 ---
 language: Ruby
-lang: hu-hu
 filename: learnruby-hu.rb
 contributors:
   - ["David Underwood", "http://theflyingdeveloper.com"]
diff --git a/hu/typescript.md b/hu/typescript.md
index ce963510..007dc28f 100644
--- a/hu/typescript.md
+++ b/hu/typescript.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Tamás Diószegi", "https://github.com/ditam"]
 filename: learntypescript-hu.ts
-lang: hu-hu
 ---
 
 A TypeScript nyelv a JavaScript nyelven írt nagy méretű alkalmazások fejlesztését kívánja megkönnyíteni.
diff --git a/hu/yaml.md b/hu/yaml.md
index ed909c4b..d40adec9 100644
--- a/hu/yaml.md
+++ b/hu/yaml.md
@@ -5,7 +5,6 @@ contributors:
   - ["Leigh Brenecki", "https://github.com/adambrenecki"]
 translators:
   - ["Tamás Diószegi", "https://github.com/ditam"]
-lang: hu-hu
 ---
 
 A YAML egy adat sorosító nyelv, amit úgy terveztek, hogy közvetlenül is 
diff --git a/id/asciidoc.md b/id/asciidoc.md
index a82fc22f..b7d08b15 100644
--- a/id/asciidoc.md
+++ b/id/asciidoc.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Rizky Luthfianto", "http://github.com/rilut"]
 filename: asciidoc-id.adoc
-lang: id-id
 ---
 
 AsciiDoc adalah bahasa markup yang mirip dengan Markdown dan dapat digunakan untuk apa saja, untuk menulis buku maupun blog. Dibuat pada tahun 2002 oleh Stuart Rackham, bahasa ini sederhana tetapi memungkinkan sejumlah besar kustomisasi.
diff --git a/id/bf.md b/id/bf.md
index 58f2b664..b46e7dc5 100644
--- a/id/bf.md
+++ b/id/bf.md
@@ -6,7 +6,6 @@ contributors:
     - ["Mathias Bynens", "http://mathiasbynens.be/"]
 translators:
     - ["Muhammad Rifqi Fatchurrahman", "http://muhrifqii.github.io/"]
-lang: id-id
 ---
 
 Brainfuck (tidak dalam huruf kapital kecuali pada awal kalimat) adalah sebuah
diff --git a/id/coffeescript.md b/id/coffeescript.md
index fdd9e09c..e02e9084 100644
--- a/id/coffeescript.md
+++ b/id/coffeescript.md
@@ -6,7 +6,6 @@ contributors:
 filename: coffeescript-id.coffee
 translators:
   - ["Rizky Luthfianto", "http://github.com/rilut"]
-lang: id-id
 ---
 
 CoffeeScript adalah bahasa sederhana yang diterjemahkan saat kompilasi ke dalam JavaScript,
diff --git a/id/css.md b/id/css.md
index fb54f135..ce4598e6 100644
--- a/id/css.md
+++ b/id/css.md
@@ -4,7 +4,6 @@ contributors:
     - ["Mohammad Valipour", "https://github.com/mvalipour"]
 translators:
     - ["Eka Y Saputra", "http://github.com/ekajogja"]
-lang: id-id
 filename: learncss-id.css
 ---
 
diff --git a/id/hq9+.md b/id/hq9+.md
index 1f798b06..d1bece63 100644
--- a/id/hq9+.md
+++ b/id/hq9+.md
@@ -5,7 +5,6 @@ contributors:
     - ["Alexey Nazaroff", "https://github.com/rogaven"]
 translators:
   - ["Haydar Ali Ismail", "http://github.com/haydarai"]
-lang: id-id
 ---
 
 HQ9+ adalah bahasa pemrograman gurauan yang dibuat oleh Cliff Biffle. Bahasa
diff --git a/id/java.md b/id/java.md
index e640c3d3..ceff71d0 100644
--- a/id/java.md
+++ b/id/java.md
@@ -11,7 +11,6 @@ contributors:
 filename: LearnJava-id.java
 translators:
   - ["Ahmad Zafrullah", "https://github.com/23Pstars"]
-lang: id-id
 ---
 
 Java adalah bahasa pemrograman yang memiliki tujuan umum dan berorientasi kelas dan objek.
diff --git a/id/json.md b/id/json.md
index 60fbfaa2..e63dfa58 100644
--- a/id/json.md
+++ b/id/json.md
@@ -7,7 +7,6 @@ filename: learnjson-id.json
 translators:
   - ["Rizky Luthfianto", "https://github.com/rilut"]
   - ["Ahmad Zafrullah", "https://github.com/23Pstars"]
-lang: id-id
 ---
 
 JSON adalah format pertukaran data yang sangat sederhana. Sebagaimana dikutip dari [json.org](http://json.org), JSON mudah untuk dibaca atau ditulis oleh manusia, dan mudah diuraikan dan diproses oleh mesin.
diff --git a/id/markdown.md b/id/markdown.md
index 25956a48..616d6722 100644
--- a/id/markdown.md
+++ b/id/markdown.md
@@ -4,7 +4,6 @@ contributors:
     - ["Dan Turkel", "http://danturkel.com/"]
 translators:
     - ["Tasya Aditya Rukmana", "http://github.com/tadityar"]
-lang: id-id
 filename: markdown-id.md
 ---
 
diff --git a/id/php.md b/id/php.md
index 331b78a8..a7cc017c 100644
--- a/id/php.md
+++ b/id/php.md
@@ -7,7 +7,6 @@ filename: learnphp-id.php
 translators:
   - ["Ahmad Zafrullah", "https://github.com/23Pstars"]
   - ["Cendy", "https://cendy.co"]
-lang: id-id
 ---
 
 Dokumen ini menjelaskan tentang PHP5 keatas.
diff --git a/id/pyqt.md b/id/pyqt.md
index b09848e5..2d74e3b6 100644
--- a/id/pyqt.md
+++ b/id/pyqt.md
@@ -7,7 +7,6 @@ contributors:
     - ["Nathan Hughes", "https://github.com/sirsharpest"]
 translators:
     - ["Rizky Luthfianto", "http://github.com/rilut"]
-lang: id-id
 ---
 
 **Qt** adalah framework terkenal untuk pengembangan perangkat lunak *cross-platform* yang dapat dijalankan pada berbagai platform perangkat lunak dan perangkat keras dengan sedikit atau tanpa perubahan dalam kode, dengan tetap memiliki kekuatan dan kecepatan aplikasi *native*. **Qt** ditulis dalam bahasa C++.
diff --git a/id/rst.md b/id/rst.md
index 52322ddc..662b7a5d 100644
--- a/id/rst.md
+++ b/id/rst.md
@@ -6,7 +6,6 @@ contributors:
     - ["Andre Polykanine", "https://github.com/Oire"]
 translators:
     - ["Haydar Ali Ismail", "https://github.com/haydarai"]
-lang: id-id
 ---
 
 RST adalah sebual format file yang dibuat oleh komunitas Python untuk menulis
diff --git a/id/ruby.md b/id/ruby.md
index 7ef86f4c..82dcdf5a 100644
--- a/id/ruby.md
+++ b/id/ruby.md
@@ -17,7 +17,6 @@ contributors:
   - ["Jake Faris", "https://github.com/farisj"]
 translators:
   - ["Ukaza Perdana", "https://github.com/ukazap"]
-lang: id-id
 ---
 
 ```ruby
diff --git a/id/smallbasic.md b/id/smallbasic.md
index 3faff38c..36aba2cb 100644
--- a/id/smallbasic.md
+++ b/id/smallbasic.md
@@ -5,7 +5,6 @@ contributors:
     - ["Chris Warren-Smith", "http://smallbasic.sourceforge.net"]
 translators:
     - ["Rizky Luthfianto", "http://github.com/rilut"]
-lang: id-id
 ---
 
 ## Tentang
diff --git a/id/xml.md b/id/xml.md
index a7452f21..d8e77671 100644
--- a/id/xml.md
+++ b/id/xml.md
@@ -6,7 +6,6 @@ contributors:
 translators:
   - ["Rizky Luthfianto", "https://github.com/rilut"]
   - ["Ahmad Zafrullah", "https://github.com/23Pstars"]
-lang: id-id
 ---
 
 XML adalah bahasa markup yang dirancang untuk menyimpan dan mengirim data. XML mudah dibaca oleh manusia dan mesin.
diff --git a/it/asciidoc.md b/it/asciidoc.md
index c0280702..030073ce 100644
--- a/it/asciidoc.md
+++ b/it/asciidoc.md
@@ -5,7 +5,6 @@ contributors:
     - ["Abel Salgado Romero", "https://twitter.com/abelsromero"]
 translators:
     - ["Ale46", "https://github.com/ale46"]
-lang: it-it
 filename: asciidoc-it.adoc
 ---
 
diff --git a/it/bash.md b/it/bash.md
index 88bfb3c5..ce618b53 100644
--- a/it/bash.md
+++ b/it/bash.md
@@ -18,7 +18,6 @@ filename: LearnBash-it.sh
 translators:
     - ["Robert Margelli", "http://github.com/sinkswim/"]
     - ["Tommaso Pifferi", "http://github.com/neslinesli93/"]
-lang: it-it
 ---
 
 Bash è il nome della shell di unix, la quale è stata distribuita anche come shell del sistema oprativo GNU e la shell di default su Linux e macOS.
diff --git a/it/bf.md b/it/bf.md
index cb290a6b..75ff9159 100644
--- a/it/bf.md
+++ b/it/bf.md
@@ -7,7 +7,6 @@ contributors:
 translators:
     - ["Ivan Sala", "http://slavni96.github.io/"]
     - ["Christian Grasso", "http://chris54721.net"]
-lang: it-it
 ---
 
 Brainfuck è un linguaggio di programmazione
diff --git a/it/c++.md b/it/c++.md
index 41c5bf40..f47e649c 100644
--- a/it/c++.md
+++ b/it/c++.md
@@ -9,7 +9,6 @@ contributors:
 translators:
     - ["Robert Margelli", "http://github.com/sinkswim/"]
     - ["Tommaso Pifferi", "http://github.com/neslinesli93/"]
-lang: it-it
 ---
 
 Il C++ è un linguaggio di programmazione il quale,
diff --git a/it/cmake.md b/it/cmake.md
index b689dd27..9444345a 100644
--- a/it/cmake.md
+++ b/it/cmake.md
@@ -5,7 +5,6 @@ contributors:
     - ["Bruno Alano", "https://github.com/brunoalano"]
 translators:
     - ["Mario Stabile", "https://github.com/mariostabile1"]
-lang: it-it
 ---
 
 CMake è un build tool multi-piattaforma e open-source. Questo tool ti permette di testare, compilare e creare pacchetti del tuo codice sorgente.
diff --git a/it/coffeescript.md b/it/coffeescript.md
index aa19d869..638d431b 100644
--- a/it/coffeescript.md
+++ b/it/coffeescript.md
@@ -5,7 +5,6 @@ contributors:
   - ["Tenor Biel", "http://github.com/L8D"]
   - ["Xavier Yao", "http://github.com/xavieryao"]
 filename: coffeescript-it.coffee
-lang: it-it
 ---
 
 CoffeeScript è un piccolo linguaggio che compila direttamente nell'equivalente
diff --git a/it/dynamic-programming.md b/it/dynamic-programming.md
index eb35192e..7787c870 100644
--- a/it/dynamic-programming.md
+++ b/it/dynamic-programming.md
@@ -5,7 +5,6 @@ contributors:
     - ["Akashdeep Goel", "http://github.com/akashdeepgoel"]
 translators:
     - ["Ale46", "https://github.com/ale46"]
-lang: it-it
 ---
 
 # Programmazione dinamica
diff --git a/it/elixir.md b/it/elixir.md
index 325c7227..94d041dc 100644
--- a/it/elixir.md
+++ b/it/elixir.md
@@ -7,7 +7,6 @@ contributors:
 translators:
     - ["Tommaso Pifferi","http://github.com/neslinesli93"]
 filename: learnelixir-it.ex
-lang: it-it
 ---
 
 Elixir è un linguaggio funzionale moderno, costruito sulla VM Erlang.
diff --git a/it/fish.md b/it/fish.md
index 3bf2c3a1..263d6d4a 100644
--- a/it/fish.md
+++ b/it/fish.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Mario Stabile", "https://github.com/mariostabile1"]
 filename: learnfish-it.fish
-lang: it-it
 ---
 
 Fish (**f**riendly **i**nteractive **sh**ell) è il nome di una shell esotica. Si tratta di una shell la cui sintassi non deriva né dalla Bourne-Shell né dalla C-Shell.
diff --git a/it/git.md b/it/git.md
index afd10f36..0d648d01 100644
--- a/it/git.md
+++ b/it/git.md
@@ -9,7 +9,6 @@ contributors:
 translators:
     - ["Christian Grasso", "http://chris54721.net"]
 filename: LearnGit-it.txt
-lang: it-it
 ---
 
 Git è un sistema di
diff --git a/it/go.md b/it/go.md
index b8399c4b..dbe50180 100644
--- a/it/go.md
+++ b/it/go.md
@@ -11,7 +11,6 @@ contributors:
     - ["Clayton Walker", "https://github.com/cwalk"]
 translators:
     - ["Tommaso Pifferi","http://github.com/neslinesli93"]
-lang: it-it
 ---
 
 Go è stato creato per avere tra le mani uno strumento in grado di arrivare
diff --git a/it/html.md b/it/html.md
index 753e7c53..59449beb 100644
--- a/it/html.md
+++ b/it/html.md
@@ -5,7 +5,6 @@ contributors:
     - ["Christophe THOMAS", "https://github.com/WinChris"]
 translators:
     - ["Ale46", "http://github.com/Ale46/"]
-lang: it-it
 ---
 
 HTML sta per HyperText Markup Language (linguaggio a marcatori per ipertesti).
diff --git a/it/java.md b/it/java.md
index 5d8e290d..812fc1fd 100644
--- a/it/java.md
+++ b/it/java.md
@@ -7,7 +7,6 @@ contributors:
 translators:
     - ["Ivan Sala","http://github.com/slavni96"]
     - ["Tommaso Pifferi","http://github.com/neslinesli93"]
-lang: it-it
 ---
 
 Java è un linguaggio di programmazione orientato ad oggetti,
diff --git a/it/javascript.md b/it/javascript.md
index d0286042..5f56c410 100644
--- a/it/javascript.md
+++ b/it/javascript.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["vinniec", "https://github.com/vinniec"]
 filename: javascript-it.js
-lang: it-it
 ---
 
 JavaScript è stato creato da Netscape di Brendan Eich nel 1995. È stato originariamente pensato come un semplice linguaggio di scripting per i siti web, complementare all'uso di java per applicazioni più complesse ma la sua stretta integrazione con le pagine Web e il supporto integrato con esse ha causato il suo divenire più comune di Java per i frontend web.
diff --git a/it/jquery.md b/it/jquery.md
index 555138af..c3d46f6f 100644
--- a/it/jquery.md
+++ b/it/jquery.md
@@ -6,7 +6,6 @@ contributors:
 filename: jquery-it.js
 translators:
     - ["Ale46", "https://github.com/ale46"]
-lang: it-it
 ---
 
 jQuery è una libreria JavaScript che ti aiuta a "fare di più, scrivendo meno". Rende molte attività comuni di JavaScript più facili da scrivere. jQuery è utilizzato da molte grandi aziende e sviluppatori in tutto il mondo. Rende AJAX, gestione degli eventi, manipolazione dei documenti e molto altro, più facile e veloce.
diff --git a/it/json.md b/it/json.md
index 192d9f77..81dbde63 100644
--- a/it/json.md
+++ b/it/json.md
@@ -8,7 +8,6 @@ contributors:
 translators:
     - ["Robert Margelli", "http://github.com/sinkswim/"]
     - ["Christian Grasso", "http://chris54721.net"]
-lang: it-it
 ---
 
 JSON è un formato per l'interscambio di dati estremamente semplice, per cui questo sarà
diff --git a/it/logtalk.md b/it/logtalk.md
index 4fbf2d10..0b2340c7 100644
--- a/it/logtalk.md
+++ b/it/logtalk.md
@@ -5,7 +5,6 @@ contributors:
     - ["Paulo Moura", "http://github.com/pmoura"]
 translators:
     - ["Ugo Chirico", "https://github.com/ugochirico"]
-lang: it-it
 ---
 
 Logtalk è un linguaggio di programmazione logica orientata agli oggetti che estende il linguaggio Prolog con le moderne tecniche di Object-Oriented Programming quali incapsulamento, ereditarietà e riutilizzo del codice, senza compromettere le caratteristiche di programmazione dichiarativa del Prolog. Logtalk è implementato in codice altamente portabile e utilizza i più moderni standard di conformità del Prolog rispetto al compilatore backend.
diff --git a/it/markdown.md b/it/markdown.md
index 296db743..584e3fbc 100644
--- a/it/markdown.md
+++ b/it/markdown.md
@@ -7,7 +7,6 @@ translators:
     - ["Jacopo Andrea Giola", "http://geekpanda.net"]
     - ["Ale46", "https://github.com/Ale46"]
 filename: markdown-it.md
-lang: it-it
 ---
 
 Markdown è stato creato da John Gruber nel 2004. Il suo scopo è quello di essere una sintassi facile da leggere e scrivere, e che può essere convertita in HTML (ad oggi anche in molti altri formati).
diff --git a/it/matlab.md b/it/matlab.md
index b96c3996..33289607 100644
--- a/it/matlab.md
+++ b/it/matlab.md
@@ -6,7 +6,6 @@ contributors:
     - ["Colton Kohnke", "http://github.com/voltnor"]
 translators:
     - ["Samuele Gallerani", "http://github.com/fontealpina"]
-lang: it-it
 filename: matlab-it.md
 ---
 
diff --git a/it/pcre.md b/it/pcre.md
index 704392ef..ee1efe4c 100644
--- a/it/pcre.md
+++ b/it/pcre.md
@@ -5,7 +5,6 @@ contributors:
     - ["Sachin Divekar", "http://github.com/ssd532"]
 translators:
     - ["Christian Grasso", "https://grasso.io"]
-lang: it-it
 ---
 
 Un'espressione regolare (regex o regexp in breve) è una speciale stringa
diff --git a/it/php-composer.md b/it/php-composer.md
index 6c2a7648..f9e85620 100644
--- a/it/php-composer.md
+++ b/it/php-composer.md
@@ -5,7 +5,6 @@ contributors:
     - ["Brett Taylor", "https://github.com/glutnix"]
 translator:
     - ["Agostino Fiscale", "https://github.com/agostinofiscale"]
-lang: it-it
 filename: LearnComposer-it.sh
 ---
 
diff --git a/it/pyqt.md b/it/pyqt.md
index 22551865..0b193aa7 100644
--- a/it/pyqt.md
+++ b/it/pyqt.md
@@ -6,7 +6,6 @@ contributors:
     - ["Nathan Hughes", "https://github.com/sirsharpest"]
 translators:
     - ["Ale46", "https://github.com/ale46"]
-lang: it-it
 ---
 
 **Qt** è un framework ampiamente conosciuto per lo sviluppo di software multipiattaforma che può essere eseguito su varie piattaforme software e hardware con modifiche minime o nulle nel codice, pur avendo la potenza e la velocità delle applicazioni native. Sebbene **Qt** sia stato originariamente scritto in *C++*.
diff --git a/it/python.md b/it/python.md
index 31ef75ea..789f5579 100644
--- a/it/python.md
+++ b/it/python.md
@@ -12,7 +12,6 @@ translators:
     - ["Draio", "http://github.com/Draio/"]
     - ["Ale46", "http://github.com/Ale46/"]
     - ["Tommaso Pifferi", "http://github.com/neslinesli93/"]
-lang: it-it    
 ---
 
 Python è stato creato da Guido Van Rossum agli inizi degli anni 90. Oggi è uno dei più popolari linguaggi esistenti. Mi sono innamorato di Python per la sua chiarezza sintattica. E' sostanzialmente pseudocodice eseguibile.
diff --git a/it/pythonlegacy.md b/it/pythonlegacy.md
index ddf7a4b0..37a741e2 100644
--- a/it/pythonlegacy.md
+++ b/it/pythonlegacy.md
@@ -9,7 +9,6 @@ contributors:
 translators:
     - ["Ale46", "http://github.com/Ale46/"]
     - ["Tommaso Pifferi", "http://github.com/neslinesli93/"]
-lang: it-it
 ---
 Python è stato creato da Guido Van Rossum agli inizi degli anni 90. Oggi è uno dei più popolari
 linguaggi esistenti. Mi sono innamorato di Python per la sua chiarezza sintattica. E' sostanzialmente
diff --git a/it/qt.md b/it/qt.md
index 7bafdad6..468acb85 100644
--- a/it/qt.md
+++ b/it/qt.md
@@ -7,7 +7,6 @@ contributors:
     - ["Aleksey Kholovchuk", "https://github.com/vortexxx192"]
 translators:
     - ["Ale46", "https://gihub.com/ale46"]
-lang: it-it
 ---
 
 **Qt** è un framework ampiamente conosciuto per lo sviluppo di software multipiattaforma che può essere eseguito su varie piattaforme software e hardware con modifiche minime o nulle nel codice, pur avendo la potenza e la velocità delle applicazioni native. Sebbene **Qt** sia stato originariamente scritto in *C++*, ci sono diversi porting in altri linguaggi: *[PyQt](https://learnxinyminutes.com/docs/pyqt/)*, *QtRuby*, *PHP-Qt*, etc.
diff --git a/it/rst.md b/it/rst.md
index e36d2c1d..c0b5dc96 100644
--- a/it/rst.md
+++ b/it/rst.md
@@ -7,7 +7,6 @@ contributors:
 translators:
     - ["Ale46", "https://github.com/Ale46"]
     - ["Chris54721", "https://chris54721.net"]
-lang: it-it
 ---
 
 RST (Restructured Text) è un formato di file inizialmente creato dalla comunità Python
diff --git a/it/ruby-ecosystem.md b/it/ruby-ecosystem.md
index 8748eea0..721ecd45 100644
--- a/it/ruby-ecosystem.md
+++ b/it/ruby-ecosystem.md
@@ -6,7 +6,6 @@ contributors:
     - ["Rafal Chmiel", "http://github.com/rafalchmiel"]
 translators:
     - ["Cristian Achille", "http://github.com/blackdev1l/"]
-lang: it-it
 ---
 
 Generalmente chi usa ruby ha l'esigenza di avere differenti versioni di Ruby
diff --git a/it/ruby.md b/it/ruby.md
index 566d492f..f349009a 100644
--- a/it/ruby.md
+++ b/it/ruby.md
@@ -18,7 +18,6 @@ contributors:
   - ["Corey Ward", "https://github.com/coreyward"]
 translators:
   - ["abonte", "https://github.com/abonte"]
-lang: it-it   
 ---
 
 ```ruby
diff --git a/it/rust.md b/it/rust.md
index 90a81d66..e144cc86 100644
--- a/it/rust.md
+++ b/it/rust.md
@@ -2,7 +2,6 @@
 language: Rust
 contributors:
     - ["Carlo Milanesi", "http://github.com/carlomilanesi"]
-lang: it-it
 filename: rust-it.rs
 ---
 
diff --git a/it/solidity.md b/it/solidity.md
index 8482a15a..c2c63334 100644
--- a/it/solidity.md
+++ b/it/solidity.md
@@ -9,7 +9,6 @@ contributors:
   - ["Patrick Collins", "https://gist.github.com/PatrickAlphaC"]
 translators:
     - ["Al", "http://github.com/al-ias"]
-lang: it-it
 ---
 
 Solidity permette di programmare su [Ethereum](https://www.ethereum.org/), una
diff --git a/it/sql.md b/it/sql.md
index 7db2eec1..0cf506d7 100644
--- a/it/sql.md
+++ b/it/sql.md
@@ -5,7 +5,6 @@ contributors:
   - ["Bob DuCharme", "http://bobdc.com/"]
 translators:
   - ["Christian Grasso", "https://grasso.io"]
-lang: it-it
 ---
 
 Structured Query Language (SQL) è un linguaggio standard ISO per la creazione e la gestione
diff --git a/it/toml.md b/it/toml.md
index fca64aec..c7f7cd0c 100644
--- a/it/toml.md
+++ b/it/toml.md
@@ -5,7 +5,6 @@ contributors:
   - ["Alois de Gouvello", "https://github.com/aloisdg"]
 translators:
   - ["Christian Grasso", "https://grasso.io"]
-lang: it-it
 ---
 
 TOML è l'acronimo di _Tom's Obvious, Minimal Language_. È un linguaggio per la
diff --git a/it/typescript.md b/it/typescript.md
index a0a256af..fbae9a58 100644
--- a/it/typescript.md
+++ b/it/typescript.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Christian Grasso", "https://grasso.io"]
 filename: learntypescript-it.ts
-lang: it-it
 ---
 
 TypeScript è un linguaggio basato su JavaScript che punta a rendere il codice
diff --git a/it/zfs.md b/it/zfs.md
index 8fefe4aa..a9ee14d2 100644
--- a/it/zfs.md
+++ b/it/zfs.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Christian Grasso","https://grasso.io"]
 filename: LearnZfs-it.txt
-lang: it-it
 ---
 
 
diff --git a/ja/asciidoc.md b/ja/asciidoc.md
index b908cf50..dbdb4136 100644
--- a/ja/asciidoc.md
+++ b/ja/asciidoc.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Ryota Kayanuma", "https://github.com/PicoSushi"]
 filename: asciidoc-ja.adoc
-lang: ja-jp
 ---
 
 AsciiDocはMarkdownに似たマークアップ言語で、書籍の執筆からブログを書くことまでなんでも使うことができます。2002年、Stuart RackhamによりAsciiDocは作成され、シンプルでありつつも沢山のカスタマイズを可能にしています。
diff --git a/ja/bash.md b/ja/bash.md
index 5d4a84d6..d80aa495 100644
--- a/ja/bash.md
+++ b/ja/bash.md
@@ -8,7 +8,6 @@ contributors:
 translators:
     - ["akirahirose", "https://twitter.com/akirahirose"]
 filename: LearnBash-jp.sh
-lang: ja-jp
 ---
 
 Bash はunixシェルの1つです。GNUオペレーションシステムのシェルとして配布されています。
diff --git a/ja/c.md b/ja/c.md
index 8a7f3e48..439a0731 100644
--- a/ja/c.md
+++ b/ja/c.md
@@ -1,7 +1,6 @@
 ---
 language: C
 filename: learnc-jp.c
-lang: ja-jp
 contributors:
   - ["Adam Bard", "http://adambard.com/"]
   - ["Árpád Goretity", "http://twitter.com/H2CO3_iOS"]
diff --git a/ja/css.md b/ja/css.md
index e03aa4e7..7764f4d0 100644
--- a/ja/css.md
+++ b/ja/css.md
@@ -11,7 +11,6 @@ contributors:
 translators:
     - ["Kenryu Shibata", "https://github.com/kenryuS"]
 filename: learncss-jp.css
-lang: ja-jp
 ---
 
 ウェブサイトはHTMLでページの構造を指定します。
diff --git a/ja/julia.md b/ja/julia.md
index 0d009216..d8d175c9 100644
--- a/ja/julia.md
+++ b/ja/julia.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Yuichi Motoyama", "https://github.com/yomichi"]
 filename: learnjulia-jp.jl
-lang: ja-jp
 ---
 
 Julia は科学技術計算向けに作られた、同図像性を持った(homoiconic) プログラミング言語です。
diff --git a/ja/nim.md b/ja/nim.md
index 9a4ee004..6c1b768b 100644
--- a/ja/nim.md
+++ b/ja/nim.md
@@ -6,7 +6,6 @@ contributors:
     - ["Dennis Felsing", "https://dennis.felsing.org"]
 translators:
     - ["Seiichi Ariga", "https://github.com/s-ariga"]
-lang: ja-jp
 ---
 
 Nim (元 Nimrod)は、静的型付けの命令型言語です。ランタイムの効率を損なうこと
diff --git a/ja/php.md b/ja/php.md
index 191d3174..5540340f 100644
--- a/ja/php.md
+++ b/ja/php.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Kazushige Tominaga", "https://github.com/kazu9su"]
 filename: learnphp-jp.php
-lang: ja-jp
 ---
 
 このドキュメントでは、 PHP 5+ について説明します。
diff --git a/ja/python.md b/ja/python.md
index fa272ba6..8ae765ff 100644
--- a/ja/python.md
+++ b/ja/python.md
@@ -13,7 +13,6 @@ translators:
     - ["Ryota Kayanuma", "https://github.com/PicoSushi"]
     - ["Kenryu Shibata", "https://github.com/kenryuS"]
 filename: learnpython-jp.py
-lang: ja-jp
 ---
 
 90年代の初め、Guido van RossumによってPythonは作成されました。現在となっては、最も有名な言語の1つです。
diff --git a/ja/r.md b/ja/r.md
index c01a4168..fcee0cf2 100644
--- a/ja/r.md
+++ b/ja/r.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["akirahirose", "https://twitter.com/akirahirose"]
 filename: learnr-jp.r
-lang: ja-jp
 ---
 
 
diff --git a/ja/rust.md b/ja/rust.md
index ce43349f..5549122e 100644
--- a/ja/rust.md
+++ b/ja/rust.md
@@ -5,7 +5,6 @@ contributors:
 filename: learnrust-jp.rs
 translators:
     - ["Takashi Takeda", "https://github.com/Takashicc"]
-lang: ja-jp
 ---
 
 RustはMozilla Researchによって開発されたプログラミング言語です。
diff --git a/ja/vim.md b/ja/vim.md
index 5e14455b..53be04e4 100644
--- a/ja/vim.md
+++ b/ja/vim.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Kota Kato", "https://github.com/kato-k"]
 filename: LearnVim-jp.txt
-lang: ja-jp
 ---
 
 
diff --git a/ja/yaml.md b/ja/yaml.md
index 4a9e4288..4b69e4ff 100644
--- a/ja/yaml.md
+++ b/ja/yaml.md
@@ -6,7 +6,6 @@ contributors:
 - [Suhas SG, 'https://github.com/jargnar']
 translators:
 - [haru, 'https://haru52.com/']
-lang: ja-jp
 ---
 
 YAMLはデータのシリアライズ用言語で、
diff --git a/ko/bash.md b/ko/bash.md
index 00805ee4..d97cd06a 100644
--- a/ko/bash.md
+++ b/ko/bash.md
@@ -17,7 +17,6 @@ contributors:
 translators:
     - ["Wooseop Kim", "https://github.com/linterpreteur"]
 filename: LearnBash-kr.sh
-lang: ko-kr
 ---
 
 Bash는 유닉스 셸의 이름이며, 리눅스와 맥 OS X의 기본 셸로 그리고 GNU 운영체제를 위한 셸로서 배포되었습니다.
diff --git a/ko/bf.md b/ko/bf.md
index 5b96bde9..4729475e 100644
--- a/ko/bf.md
+++ b/ko/bf.md
@@ -7,7 +7,6 @@ contributors:
 translators:
     - ["JongChan Choi", "http://0xABCDEF.com/"]
     - ["Peter Lee", "http://peterjlee.com/"]
-lang: ko-kr
 ---
 
 Brainfuck(문장을 시작하는 단어가 아닌이상 첫글자는 대문자를 사용하지 않습니다)은
diff --git a/ko/clojure-macros.md b/ko/clojure-macros.md
index 6131caa6..ccc10894 100644
--- a/ko/clojure-macros.md
+++ b/ko/clojure-macros.md
@@ -5,7 +5,6 @@ contributors:
     - ["Adam Bard", "http://adambard.com/"]
 translators:
     - ["Eunpyoung Kim", "https://github.com/netpyoung"]
-lang: ko-kr
 ---
 
 다른 모든 Lisp와 마찬가지로, Clojure가 가진 [동형성(homoiconicity)](https://en.wikipedia.org/wiki/Homoiconic)은
diff --git a/ko/clojure.md b/ko/clojure.md
index 9fd18f29..59a4fbf6 100644
--- a/ko/clojure.md
+++ b/ko/clojure.md
@@ -5,7 +5,6 @@ contributors:
     - ["Adam Bard", "http://adambard.com/"]
 translators:
     - ["netpyoung", "http://netpyoung.github.io/"]
-lang: ko-kr
 ---
 
 Clojure는 Java 가상머신을 위해 개발된 Lisp 계통의 언어입니다
diff --git a/ko/coffeescript.md b/ko/coffeescript.md
index a7da2b74..4c2c55cb 100644
--- a/ko/coffeescript.md
+++ b/ko/coffeescript.md
@@ -6,7 +6,6 @@ contributors:
 filename: coffeescript-kr.coffee
 translators:
     - ["wikibook", "http://wikibook.co.kr"]
-lang: ko-kr
 ---
 
 ``` coffeescript
diff --git a/ko/common-lisp.md b/ko/common-lisp.md
index eb651277..67135a3a 100644
--- a/ko/common-lisp.md
+++ b/ko/common-lisp.md
@@ -7,7 +7,6 @@ contributors:
   - ["Rommel Martinez", "https://ebzzry.io"]
 translators:
   - ["Eunpyoung Kim", "https://github.com/netpyoung"]
-lang: ko-kr
 ---
 
 커먼 리스프(Common Lisp, CL)는 다양한 산업 어플리케이션에 적합한 범용적인 멀티페러다임 언어입니다.
diff --git a/ko/erlang.md b/ko/erlang.md
index 5362578d..06359a2d 100644
--- a/ko/erlang.md
+++ b/ko/erlang.md
@@ -5,7 +5,6 @@ contributors:
 filename: learnerlang-kr.erl
 translators:
     - ["Taesung Jung", "https://github.com/tsj"]
-lang: ko-kr
 ---
 
 ```erlang
diff --git a/ko/go.md b/ko/go.md
index dc0fea1c..abef0c2c 100644
--- a/ko/go.md
+++ b/ko/go.md
@@ -10,7 +10,6 @@ contributors:
 translators:
     - ["Jongmin Kim", "http://github.com/atomaths"]
     - ["Peter Lee", "http://github.com/ins429"]
-lang: ko-kr
 ---
 
 Go는 어떤 일을 잘 끝낼 수 있도록 하기위해 만들어졌다. Go가 잘 알려진 최신의
diff --git a/ko/java.md b/ko/java.md
index ec77d5e2..86a8e047 100644
--- a/ko/java.md
+++ b/ko/java.md
@@ -6,7 +6,6 @@ contributors:
     - ["Jake Prather", "http://github.com/JakeHP"]
 translators:
     - ["wikibook", "http://wikibook.co.kr"]
-lang: ko-kr
 ---
 
 자바는 일반 목적으로 사용할 수 있고 동시성을 지원하며, 클래스 기반의 객체지향 컴퓨터 프로그래밍 언어입니다.
diff --git a/ko/javascript.md b/ko/javascript.md
index 4376b422..88a4b756 100644
--- a/ko/javascript.md
+++ b/ko/javascript.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["wikibook", "http://wikibook.co.kr"]
 filename: javascript-kr.js
-lang: ko-kr
 ---
 
 자바스크립트는 넷스케이프의 브렌던 아이크(Brendan Eich)가 1995년에 만들었습니다.
diff --git a/ko/json.md b/ko/json.md
index 1cc6c5f3..f6c64c60 100644
--- a/ko/json.md
+++ b/ko/json.md
@@ -8,7 +8,6 @@ contributors:
   - ["Michael Neth", "https://github.com/infernocloud"]
 translators:
   - ["Wooseop Kim", "https://github.com/linterpreteur"]
-lang: ko-kr
 ---
 
 JSON은 아주 간단한 데이터 교환 포맷입니다. [json.org](http://json.org/json-ko.html)에 의하면, 사람이 읽고 쓰기 쉬우며 기계가 분석하고 생성하기 쉽습니다.
diff --git a/ko/kotlin.md b/ko/kotlin.md
index e4ede03b..26552b17 100644
--- a/ko/kotlin.md
+++ b/ko/kotlin.md
@@ -4,7 +4,6 @@ contributors:
     - ["S Webber", "https://github.com/s-webber"]
 translators: 
     - ["Alan Jeon", "https://github.com/skyisle"]
-lang: ko-kr
 filename: LearnKotlin-kr.kt
 ---
 
diff --git a/ko/lua.md b/ko/lua.md
index 24acc442..a5766537 100644
--- a/ko/lua.md
+++ b/ko/lua.md
@@ -5,7 +5,6 @@ contributors:
     - ["Tyler Neylon", "http://tylerneylon.com/"]
 translators:
     - ["wikibook", "http://wikibook.co.kr"]
-lang: ko-kr
 filename: learnlua-kr.lua
 ---
 
diff --git a/ko/markdown.md b/ko/markdown.md
index 808cf375..7346f9d4 100644
--- a/ko/markdown.md
+++ b/ko/markdown.md
@@ -4,7 +4,6 @@ contributors:
     - ["Dan Turkel", "http://danturkel.com/"]
     - ["Jacob Ward", "http://github.com/JacobCWard/"]
 filename: markdown-kr.md
-lang: ko-kr
 ---
 
 마크다운은 2004년에 존 그루버가 창시했습니다. HTML으로 (그리고 이제는 다른 다양한 형식으로도) 쉽게 변환되는 읽고 쓰기 쉬운 문법입니다.
diff --git a/ko/php.md b/ko/php.md
index 48b75849..a4c4446d 100644
--- a/ko/php.md
+++ b/ko/php.md
@@ -7,7 +7,6 @@ contributors:
 filename: learnphp-kr.php
 translators:
     - ["wikibook", "http://wikibook.co.kr"]
-lang: ko-kr
 ---
 
 이 문서에서는 PHP 5+를 설명합니다.
diff --git a/ko/pythonlegacy.md b/ko/pythonlegacy.md
index cda13f6c..367540f9 100644
--- a/ko/pythonlegacy.md
+++ b/ko/pythonlegacy.md
@@ -6,7 +6,6 @@ contributors:
 filename: learnpythonlegacy-ko.py
 translators:
     - ["wikibook", "http://wikibook.co.kr"]
-lang: ko-kr
 ---
 
 파이썬은 귀도 반 로섬이 90년대에 만들었습니다. 파이썬은 현존하는 널리 사용되는 언어 중 하나입니다.
diff --git a/ko/racket.md b/ko/racket.md
index 2d0ccb01..c50b1626 100644
--- a/ko/racket.md
+++ b/ko/racket.md
@@ -9,7 +9,6 @@ contributors:
   - ["Duong H. Nguyen", "https://github.com/cmpitg"]
 translators:
   - ["KIM Taegyoon", "https://github.com/kimtg"]
-lang: ko-kr
 ---
 
 Racket 은 Lisp/Scheme 계열의 일반 목적의, 다중 패러다임 프로그래밍 언어이다.
diff --git a/ko/vim.md b/ko/vim.md
index 80615835..1e54f534 100644
--- a/ko/vim.md
+++ b/ko/vim.md
@@ -7,7 +7,6 @@ translators:
     - ["Wooseop Kim", "https://github.com/linterpreteur"]
     - ["Yeongjae Jang", "https://github.com/Liberatedwinner"]
 filename: LearnVim-kr.txt
-lang: ko-kr
 ---
 
 [Vim](http://www.vim.org)
diff --git a/ko/xml.md b/ko/xml.md
index 851d2d5a..6d120634 100644
--- a/ko/xml.md
+++ b/ko/xml.md
@@ -7,7 +7,6 @@ contributors:
   - ["Deepanshu Utkarsh", "https://github.com/duci9y"]
 translators:
   - ["Wooseop Kim", "https://github.com/linterpreteur"]
-lang: ko-kr
 ---
 
 XML은 데이터를 저장하고 전송하기 위해 설계된 마크업 언어입니다. 인간과 기계 모두가 읽을 수 있도록 만들어졌습니다.
diff --git a/ko/yaml.md b/ko/yaml.md
index 5f91afff..e8088dce 100644
--- a/ko/yaml.md
+++ b/ko/yaml.md
@@ -7,7 +7,6 @@ contributors:
 translators:
 - ["Wooseop Kim", "https://github.com/linterpreteur"]
 - ["Justin Yang", "https://github.com/justin-themedium"]
-lang: ko-kr
 ---
 
 YAML은 인간이 직접 쓰고 읽을 수 있도록 설계된 데이터 직렬화 언어입니다.
diff --git a/lt/json.md b/lt/json.md
index 8e1279e0..0b73731c 100644
--- a/lt/json.md
+++ b/lt/json.md
@@ -1,7 +1,6 @@
 ---
 language: JSON
 filename: learnjson-lt.json
-lang: lt-lt
 contributors:
   - ["Zygimantus", "https://github.com/zygimantus"]
 ---
diff --git a/lt/tmux.md b/lt/tmux.md
index 36b38ef0..e9cd5c0d 100644
--- a/lt/tmux.md
+++ b/lt/tmux.md
@@ -6,7 +6,6 @@ contributors:
     - ["mdln", "https://github.com/mdln"]
 translators:
     - ["Zygimantus", "https://github.com/zygimantus"]
-lang: lt-lt
 
 ---
 
diff --git a/ms/bash.md b/ms/bash.md
index 0f5b6d80..af197365 100644
--- a/ms/bash.md
+++ b/ms/bash.md
@@ -13,7 +13,6 @@ contributors:
 filename: LearnBash-ms.sh
 translators:
     - ["hack1m", "https://github.com/hack1m"]
-lang: ms-my   
 ---
 
 Bash adalah nama daripada unix shell, yang mana telah diagihkan sebagai shell untuk sistem operasi GNU dan sebagai shell lalai pada Linux dan macOS. Hampir semua contoh di bawah boleh menjadi sebahagian daripada skrip shell atau dijalankan terus dalam shell.
diff --git a/ms/clojure-macros.md b/ms/clojure-macros.md
index 74b6adc6..9df2be18 100644
--- a/ms/clojure-macros.md
+++ b/ms/clojure-macros.md
@@ -5,7 +5,6 @@ contributors:
     - ["Adam Bard", "http://adambard.com/"]
 translators:
     - ["Burhanuddin Baharuddin", "https://github.com/burhanloey"]
-lang: ms-my
 ---
 
 Sama seperti Lisp yang lain, sifat Clojure yang mempunyai [homoiconicity](https://en.wikipedia.org/wiki/Homoiconic)
diff --git a/ms/clojure.md b/ms/clojure.md
index fc0e5a8a..ce635d0e 100644
--- a/ms/clojure.md
+++ b/ms/clojure.md
@@ -5,7 +5,6 @@ contributors:
     - ["Adam Bard", "http://adambard.com/"]
 translators:
     - ["Burhanuddin Baharuddin", "https://github.com/burhanloey"]
-lang: ms-my
 ---
 
 Clojure ialah salah satu bahasa pengaturcaraan dalam keluarga Lisp yang dibangunkan untuk Java Virtual Machine. Ia lebih
diff --git a/ms/coffeescript.md b/ms/coffeescript.md
index 43b6fef0..74e429d1 100644
--- a/ms/coffeescript.md
+++ b/ms/coffeescript.md
@@ -6,7 +6,6 @@ contributors:
 filename: coffeescript-ms.coffee
 translators:
     - ["hack1m", "https://github.com/hack1m"]
-lang: ms-my
 ---
 
 CoffeeScript adalah bahasa kecil yang menyusun/kompil satu-per-satu menjadi setara JavaScript, dan tidak ada interpretasi di runtime.
diff --git a/ms/common-lisp.md b/ms/common-lisp.md
index ea976640..66b0769e 100644
--- a/ms/common-lisp.md
+++ b/ms/common-lisp.md
@@ -7,7 +7,6 @@ contributors:
   - ["Rommel Martinez", "https://ebzzry.io"]
 translators:
   - ["Burhanuddin Baharuddin", "https://github.com/burhanloey"]
-lang: ms-my
 ---
 
 Common Lisp ialah programming language yang general-purpose (boleh digunakan untuk semua benda) dan multi-paradigm (konsep yang pelbagai) sesuai untuk pelbagai kegunaan di dalam
diff --git a/ms/elisp.md b/ms/elisp.md
index 7d10ddbd..1e8146d3 100644
--- a/ms/elisp.md
+++ b/ms/elisp.md
@@ -5,7 +5,6 @@ contributors:
     - ["Saurabh Sandav", "http://github.com/SaurabhSandav"]
 translators:
     - ["Burhanuddin Baharuddin", "https://github.com/burhanloey"]
-lang: ms-my
 filename: learn-emacs-lisp-ms.el
 ---
 
diff --git a/ms/javascript.md b/ms/javascript.md
index 2324826c..1398be44 100644
--- a/ms/javascript.md
+++ b/ms/javascript.md
@@ -6,7 +6,6 @@ contributors:
 filename: javascript-ms.js
 translators:
     - ["abdalim", "https://github.com/abdalim"]
-lang: ms-my
 ---
 
 JavaScript dicipta oleh Brendan Eich dari Netscape pada 1995. Pada awalnya, ia
diff --git a/ms/json.md b/ms/json.md
index 3f146507..9f01adf8 100644
--- a/ms/json.md
+++ b/ms/json.md
@@ -8,7 +8,6 @@ contributors:
   - ["Michael Neth", "https://github.com/infernocloud"]
 translators:
     - ["abdalim", "https://github.com/abdalim"]
-lang: ms-my
 ---
 
 Disebabkan JSON adalah format pertukaran-data yang sangat ringkas, panduan ini
diff --git a/ms/sass.md b/ms/sass.md
index 14e716ee..f420ad28 100644
--- a/ms/sass.md
+++ b/ms/sass.md
@@ -5,7 +5,6 @@ contributors:
   - ["Laura Kyle", "https://github.com/LauraNK"]
 translators:
   - ["hack1m", "https://github.com/hack1m"]
-lang: ms-my
 ---
 
 Sass ialah bahasa sambungan CSS yang menambah ciri-ciri seperti pembolehubah, bersarang, mixins dan banyak lagi.
diff --git a/ms/xml.md b/ms/xml.md
index b3f7402c..3f724bd5 100644
--- a/ms/xml.md
+++ b/ms/xml.md
@@ -5,7 +5,6 @@ contributors:
   - ["João Farias", "https://github.com/JoaoGFarias"]
 translators:
     - ["hack1m", "https://github.com/hack1m"]
-lang: ms-my   
 ---
 
 XML adalah bahasa markup direka untuk menyimpan dan mengangkutan data.
diff --git a/nl/amd.md b/nl/amd.md
index 0e0788b7..d6f02fcc 100644
--- a/nl/amd.md
+++ b/nl/amd.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Reinoud Kruithof", "https://github.com/reinoudk"]
 filename: learnamd-nl.js
-lang: nl-nl
 ---
 
 ## Aan de slag met AMD
diff --git a/nl/bash.md b/nl/bash.md
index f4689b14..3b5ae144 100644
--- a/nl/bash.md
+++ b/nl/bash.md
@@ -12,7 +12,6 @@ contributors:
     - ["Etan Reisner", "https://github.com/deryni"]
 translators:
     - ["Jeroen Deviaene", "https://www.github.com/jerodev"]
-lang: nl-nl
 filename: LearnBash-nl.sh
 ---
 
diff --git a/nl/bf.md b/nl/bf.md
index 4c31311d..ecddf933 100644
--- a/nl/bf.md
+++ b/nl/bf.md
@@ -6,7 +6,6 @@ contributors:
     - ["Mathias Bynens", "http://mathiasbynens.be/"]
 translators:
     - ["Jelle Besseling", "https://github.com/Jell-E"]
-lang: nl-nl
 ---
 
 Brainfuck (schrijf je niet met een hoofdletter behalve aan het begin van een
diff --git a/nl/coffeescript.md b/nl/coffeescript.md
index fad121c8..413056d1 100644
--- a/nl/coffeescript.md
+++ b/nl/coffeescript.md
@@ -8,7 +8,6 @@ translators:
   - ["D.A.W. de Waal", "http://github.com/diodewaal"]
   - ["Sam van Kampen", "http://tehsvk.net"]
 filename: coffeescript-nl.coffee
-lang: nl-nl
 ---
 
 CoffeeScript is een kleine programmeertaal die direct compileert naar
diff --git a/nl/dynamic-programming.md b/nl/dynamic-programming.md
index e56a9774..b25ea751 100644
--- a/nl/dynamic-programming.md
+++ b/nl/dynamic-programming.md
@@ -5,7 +5,6 @@ contributors:
     - ["Akashdeep Goel", "http://github.com/akashdeepgoel"]
 translators:
   - ["Jasper Haasdijk", "https://github.com/jhaasdijk"]
-lang: nl-nl
 ---
 
 # Dynamisch Programmeren
diff --git a/nl/html.md b/nl/html.md
index a89bcbe0..efc7f22a 100644
--- a/nl/html.md
+++ b/nl/html.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Robert Steed", "https://github.com/robochat"]
     - ["Jeroen Deviaene", "https://github.com/jerodev"]
-lang: nl-nl
 ---
 
 HTML staat voor HyperText Markup Language.
diff --git a/nl/json.md b/nl/json.md
index e12787cf..d45c017d 100644
--- a/nl/json.md
+++ b/nl/json.md
@@ -8,7 +8,6 @@ contributors:
   - ["Maarten Jacobs", "https://github.com/maartenJacobs"]
 translators:
   - ["Niels van Velzen", "https://nielsvanvelzen.me"]
-lang: nl-nl
 ---
 
 Gezien JSON een zeer eenvouding formaat heeft zal dit één van de simpelste
diff --git a/nl/markdown.md b/nl/markdown.md
index 1c962bf6..117b35ba 100644
--- a/nl/markdown.md
+++ b/nl/markdown.md
@@ -5,7 +5,6 @@ contributors:
   - ["Dan Turkel", "http://danturkel.com/"]
 translators:
   - ["Jeroen Deviaene", "https://www.github.com/jerodev"]
-lang: nl-nl
 ---
 
 Markdown is gecreëerd door John Gruber in 2004. Het is bedoeld om met een gemakkelijke te lezen en 
diff --git a/nl/typescript.md b/nl/typescript.md
index 69039cbb..d8c86a91 100644
--- a/nl/typescript.md
+++ b/nl/typescript.md
@@ -5,7 +5,6 @@ contributors:
 filename: learntypescript-nl.ts
 translators:
   - ["Niels van Velzen", "https://nielsvanvelzen.me"]
-lang: nl-nl
 ---
 
 TypeScript is een taal gericht op het versoepelen van de ontwikkeling van
diff --git a/nl/vim.md b/nl/vim.md
index 2dc9c0ca..a7571152 100644
--- a/nl/vim.md
+++ b/nl/vim.md
@@ -6,7 +6,6 @@ contributors:
 translators:
   - ["Rick Haan", "https://github.com/RickHaan"]
 filename: learnvim-nl.yaml
-lang: nl-nl
 ---
 
 # Vim in het Nederlands
diff --git a/nl/xml.md b/nl/xml.md
index decf5b3a..b5cd938f 100644
--- a/nl/xml.md
+++ b/nl/xml.md
@@ -5,7 +5,6 @@ contributors:
   - ["João Farias", "https://github.com/JoaoGFarias"]
 translators:
   - ["Frank van Gemeren", "https://github.com/frvge"]
-lang: nl-nl
 ---
 
 XML is een markuptaal die ontwikkeld is om data in te bewaren en data mee te 
diff --git a/nl/yaml.md b/nl/yaml.md
index 0f3fa637..ca957a4f 100644
--- a/nl/yaml.md
+++ b/nl/yaml.md
@@ -6,7 +6,6 @@ contributors:
 translators:
   - ["Niels van Velzen", "https://nielsvanvelzen.me"]
   - ["Sam van Kampen", "http://tehsvk.net"]
-lang: nl-nl
 ---
 
 YAML is een dataserialisatietaal ontworpen om snel te kunnen worden begrepen door mensen.
diff --git a/no/bash.md b/no/bash.md
index 2e6ca2a3..809ee1d5 100644
--- a/no/bash.md
+++ b/no/bash.md
@@ -12,7 +12,6 @@ contributors:
 filename: LearnBash-no.sh
 translators:
     - ["Andreas Lindahl Flåten", "https://github.com/anlif"]
-lang: no-nb
 ---
 Bash er navnet på unix skallet, som også var distribuert som skallet for GNU 
 operativsystemet og som standard skall på de fleste Linux distribusjoner og 
diff --git a/no/json.md b/no/json.md
index 48ba36cd..900f7ef6 100644
--- a/no/json.md
+++ b/no/json.md
@@ -1,7 +1,6 @@
 ---
 language: JSON
 filename: learnjson-no.json
-lang: no-nb
 contributors:
   - ["Ole Mathias Heggem", "https://github.com/msbone"]
   - ["Anna Harren", "https://github.com/iirelu"]
diff --git a/pl/bf.md b/pl/bf.md
index 7057c1c8..10061859 100644
--- a/pl/bf.md
+++ b/pl/bf.md
@@ -8,7 +8,6 @@ contributors:
 translators:
     - ["Jakub Młokosiewicz", "https://github.com/hckr"]
     - ["Mateusz Burniak", "https://github.com/matbur"]
-lang: pl-pl
 
 ---
 
diff --git a/pl/haskell.md b/pl/haskell.md
index dceda536..030e0cfc 100644
--- a/pl/haskell.md
+++ b/pl/haskell.md
@@ -6,7 +6,6 @@ contributors:
     - ["Adit Bhargava", "http://adit.io"]
 translators:
     - ["Remigiusz Suwalski", "https://github.com/remigiusz-suwalski"]
-lang: pl-pl
 
 ---
 
diff --git a/pl/java.md b/pl/java.md
index 7e47d525..c3a58524 100644
--- a/pl/java.md
+++ b/pl/java.md
@@ -15,7 +15,6 @@ contributors:
     - ["Shawn M. Hanes", "https://github.com/smhanes15"]
 translators:
     - ["Jacek Wachowiak", "https://github.com/jacekwachowiak"]
-lang: pl-pl
 ---
 
 Java jest współbieżnym, opartym na klasach, obiektowym językiem programowania
diff --git a/pl/json.md b/pl/json.md
index 41b6b0c6..44e3d67f 100644
--- a/pl/json.md
+++ b/pl/json.md
@@ -8,7 +8,6 @@ contributors:
   - ["Michael Neth", "https://github.com/infernocloud"]
 translators:
   - ["Michał Mitrosz", "https://github.com/Voltinus"]
-lang: pl-pl
 filename: learnjson-pl.json
 ---
 
diff --git a/pl/perl.md b/pl/perl.md
index 68cd0fd0..223f09f0 100644
--- a/pl/perl.md
+++ b/pl/perl.md
@@ -7,7 +7,6 @@ contributors:
     - ["Dan Book", "http://github.com/Grinnz"]
 translators:
     - ["Michał Kupczyński", "http://github.com/ukoms"]
-lang: pl-pl
 
 ---
 
diff --git a/pl/pythonlegacy.md b/pl/pythonlegacy.md
index 1e9f8c1e..e6b2f601 100644
--- a/pl/pythonlegacy.md
+++ b/pl/pythonlegacy.md
@@ -7,7 +7,6 @@ contributors:
     - ["Andre Polykanine", "https://github.com/Oire"]
 translators:
     - ["Dominik Krzemiński", "https://github.com/dokato"]
-lang: pl-pl
 ---
 
 Python został opracowany przez Guido Van Rossuma na początku lat 90-tych.
diff --git a/pl/ruby.md b/pl/ruby.md
index b4972713..da98fea6 100644
--- a/pl/ruby.md
+++ b/pl/ruby.md
@@ -16,7 +16,6 @@ contributors:
   - ["Persa Zula", "http://persazula.com"]
 translators:
     - ["Marcin Klocek", "https://github.com/mklocek"]
-lang: pl-pl
 ---
 
 ```ruby
diff --git a/pl/vim.md b/pl/vim.md
index d1171735..2eaff9b6 100644
--- a/pl/vim.md
+++ b/pl/vim.md
@@ -5,7 +5,6 @@ contributors:
     - ["RadhikaG", "https://github.com/RadhikaG"]
 translators:
     - ["Adam Bobowski", "https://github.com/Bobowski"]
-lang: pl-pl
 filename: LearnVim-pl.txt
 ---
 
diff --git a/pl/xml.md b/pl/xml.md
index d68496ff..0ca2e1ee 100644
--- a/pl/xml.md
+++ b/pl/xml.md
@@ -5,7 +5,6 @@ contributors:
   - ["João Farias", "https://github.com/JoaoGFarias"]
 translators:  
   - ["Tomasz Janiszewski", "https://github.com/janisz"]  
-lang: pl-pl
 ---
 
 XML (_Extensible Markup Language_) to rozszerzalny język znaczników, stworzony
diff --git a/pt-br/amd.md b/pt-br/amd.md
index 0ece2797..dc1f8099 100644
--- a/pt-br/amd.md
+++ b/pt-br/amd.md
@@ -5,7 +5,6 @@ contributors:
     - ["Frederik Ring", "https://github.com/m90"]
 translators:
     - ["Felipe Tarijon", "http://nanoincub.com/"]
-lang: pt-br
 filename: learnamd-pt.js
 ---
 
diff --git a/pt-br/asciidoc.md b/pt-br/asciidoc.md
index db17144f..5368ee69 100644
--- a/pt-br/asciidoc.md
+++ b/pt-br/asciidoc.md
@@ -4,7 +4,6 @@ contributors:
     - ["Ryan Mavilia", "http://unoriginality.rocks/"]
 translators:
     - ["David Lima", "https://github.com/davelima"]
-lang: pt-br
 filename: asciidoc-pt.adoc
 ---
 
diff --git a/pt-br/asymptotic-notation.md b/pt-br/asymptotic-notation.md
index e7dc1b20..80eaf536 100644
--- a/pt-br/asymptotic-notation.md
+++ b/pt-br/asymptotic-notation.md
@@ -5,7 +5,6 @@ contributors:
     - ["Jake Prather", "http://github.com/JakeHP"]
 translators:
     - ["João Farias", "https://github.com/JoaoGFarias"]
-lang: pt-br
 ---
 
 # Notação Assintótica
diff --git a/pt-br/awk.md b/pt-br/awk.md
index 3db73672..d7a6c2d7 100644
--- a/pt-br/awk.md
+++ b/pt-br/awk.md
@@ -6,7 +6,6 @@ contributors:
     - ["Marshall Mason", "http://github.com/marshallmason"]
 translators:
     - ["Paulo Henrique Rodrigues Pinheiro", "https://github.com/paulohrpinheiro"]
-lang: pt-br
 
 ---
 
diff --git a/pt-br/bash.md b/pt-br/bash.md
index ad6b70b8..7be0ad3f 100644
--- a/pt-br/bash.md
+++ b/pt-br/bash.md
@@ -10,7 +10,6 @@ contributors:
 translators:
     - ["Davidson Mizael", "https://github.com/davidsonmizael"]
 filename: LearnBash-pt_br.sh
-lang: pt-br
 ---
 
 Tutorial de shell em português
diff --git a/pt-br/bc.md b/pt-br/bc.md
index 90908127..963d9e57 100644
--- a/pt-br/bc.md
+++ b/pt-br/bc.md
@@ -4,7 +4,6 @@ contributors:
     - ["Btup"]
 translators:
     - ["David Lima", "https://github.com/davelima"]
-lang: pt-br
 filename: learnbc-pt.bc
 ---
 ```bc
diff --git a/pt-br/bf.md b/pt-br/bf.md
index bc30dae2..b6fa0d0d 100644
--- a/pt-br/bf.md
+++ b/pt-br/bf.md
@@ -7,7 +7,6 @@ contributors:
 translators:
     - ["Suzane Sant Ana", "http://github.com/suuuzi"]
     - ["Rodrigo Muniz", "http://github.com/muniz95"]
-lang: pt-br
 ---
 
 Brainfuck (em letras minúsculas, exceto no início de frases) é uma linguagem de
diff --git a/pt-br/c++.md b/pt-br/c++.md
index dec5866e..eb076f0c 100644
--- a/pt-br/c++.md
+++ b/pt-br/c++.md
@@ -6,7 +6,6 @@ contributors:
     - ["Matt Kline", "https://github.com/mrkline"]
 translators:
     - ["Miguel Araújo", "https://github.com/miguelarauj1o"]
-lang: pt-br
 ---
 
 C++ é uma linguagem de programação de sistemas que,
diff --git a/pt-br/c.md b/pt-br/c.md
index 9575007a..415c1b4e 100644
--- a/pt-br/c.md
+++ b/pt-br/c.md
@@ -9,7 +9,6 @@ translators:
     - ["Elton Viana", "https://github.com/eltonvs"]
     - ["Cássio Böck", "https://github.com/cassiobsilva"]
     - ["Heitor P. de Bittencourt", "https://github.com/heitorPB/"]
-lang: pt-br
 ---
 
 Ah, C. Ainda é **a** linguagem de computação de alta performance.
diff --git a/pt-br/clojure-macros.md b/pt-br/clojure-macros.md
index 179ca8e9..2bf4b499 100644
--- a/pt-br/clojure-macros.md
+++ b/pt-br/clojure-macros.md
@@ -5,7 +5,6 @@ contributors:
     - ["Adam Bard", "http://adambard.com/"]
 translators:
     - ["Raphael Bezerra do Nascimento"]
-lang: pt-br
 ---
 
 Como todas as Lisps, a inerente [homoiconicity](https://en.wikipedia.org/wiki/Homoiconic)
diff --git a/pt-br/clojure.md b/pt-br/clojure.md
index 915810ec..4a1e51c2 100644
--- a/pt-br/clojure.md
+++ b/pt-br/clojure.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Mariane Siqueira Machado", "https://twitter.com/mariane_sm"]
     - ["Ygor Sad", "https://github.com/ysads"]
-lang: pt-br
 ---
 
 Clojure é uma linguagem da família do Lisp desenvolvida para a JVM (máquina virtual Java). Possui uma ênfase muito mais forte em [programação funcional](https://pt.wikipedia.org/wiki/Programa%C3%A7%C3%A3o_funcional) pura do que Common Lisp, mas inclui diversos recursos [STM](https://en.wikipedia.org/wiki/Software_transactional_memory) para lidar com estado e mutabilidade, caso isso seja necessário.
diff --git a/pt-br/cmake.md b/pt-br/cmake.md
index e40fc0a9..0de0e22c 100644
--- a/pt-br/cmake.md
+++ b/pt-br/cmake.md
@@ -6,7 +6,6 @@ contributors:
 filename: CMake-br
 translators:
     - ["Lucas Pugliesi", "https://github.com/fplucas"]
-lang: pt-br
 ---
 
 CMake é um programa de compilação open-source e multiplataforma. Essa ferramenta
diff --git a/pt-br/coffeescript.md b/pt-br/coffeescript.md
index b49fb990..1e51a868 100644
--- a/pt-br/coffeescript.md
+++ b/pt-br/coffeescript.md
@@ -6,7 +6,6 @@ contributors:
   - ["Claudio Busatto", "http://github.com/cjcbusatto"]
 translators:
     - ["Miguel Araújo", "https://github.com/miguelarauj1o"]
-lang: pt-br
 filename: learncoffeescript-pt.coffee
 ---
 
diff --git a/pt-br/common-lisp.md b/pt-br/common-lisp.md
index b0755bc7..50d4f56b 100644
--- a/pt-br/common-lisp.md
+++ b/pt-br/common-lisp.md
@@ -5,7 +5,6 @@ contributors:
   - ["Paul Nathan", "https://github.com/pnathan"]
 translators:
   - ["Édipo Luis Féderle", "https://github.com/edipofederle"]
-lang: pt-br
 ---
 
 ANSI Common Lisp é uma linguagem de uso geral, multi-paradigma, designada
diff --git a/pt-br/csharp.md b/pt-br/csharp.md
index d464a639..67b90e80 100644
--- a/pt-br/csharp.md
+++ b/pt-br/csharp.md
@@ -3,7 +3,6 @@ language: C#
 filename: csharp-pt.cs
 contributors:
     - ["Robson Alves", "http://robsonalves.net/"]    
-lang: pt-br
 ---
 
 C# é uma linguagem elegante, altamente tipada e orientada a objetos que permite aos desenvolvedores criar uma variedade de aplicações seguras e robustas que são executadas no .NET Framework.
diff --git a/pt-br/css.md b/pt-br/css.md
index bc6c9bf2..fcc10fad 100644
--- a/pt-br/css.md
+++ b/pt-br/css.md
@@ -11,7 +11,6 @@ translators:
     - ["Adaías Magdiel", "https://adaiasmagdiel.com/"]
     - ["Gabriel Gomes", "https://github.com/gabrielgomesferraz"]
     - ["Gabriele Luz", "https://github.com/gabrieleluz"]
-lang: pt-br
 ---
 
 Páginas web são feitas utilizando HTML para demarcar o conteúdo.
diff --git a/pt-br/cypher.md b/pt-br/cypher.md
index c93ab0ff..4dab9a57 100644
--- a/pt-br/cypher.md
+++ b/pt-br/cypher.md
@@ -4,7 +4,6 @@ filename: LearnCypher-br.cql
 contributors:
     - ["Théo Gauchoux", "https://github.com/TheoGauchoux"]
 
-lang: pt-br
 ---
 O Cypher é a linguagem de consulta do Neo4j para manipular gráficos facilmente. Ela reutiliza a sintaxe do SQL e a mistura com o tipo de ascii-art para representar gráficos. Este tutorial pressupõe que você já conheça conceitos de gráficos como nós e relacionamentos.
 
diff --git a/pt-br/d.md b/pt-br/d.md
index e01eae77..dd1145e9 100644
--- a/pt-br/d.md
+++ b/pt-br/d.md
@@ -5,7 +5,6 @@ contributors:
     - ["Nick Papanastasiou", "www.nickpapanastasiou.github.io"]
 translators:
     - ["Julio Vanzelli", "https://github.com/JulioVanzelli"]
-lang: pt-br
 ---
 
 ```d
diff --git a/pt-br/dart.md b/pt-br/dart.md
index 9a8b42a9..9514fcc1 100644
--- a/pt-br/dart.md
+++ b/pt-br/dart.md
@@ -6,7 +6,6 @@ contributors:
     - ["Hélio Oliveira", "https://github.com/insign/"]
 translators:
     - ["Junior Damacena", "https://github.com/jdamacena/"]
-lang: pt-br
 ---
 
 Dart é uma novata no reino das linguagens de programação.
diff --git a/pt-br/dynamic-programming.md b/pt-br/dynamic-programming.md
index 93171955..0ce930d1 100644
--- a/pt-br/dynamic-programming.md
+++ b/pt-br/dynamic-programming.md
@@ -5,7 +5,6 @@ contributors:
     - ["Akashdeep Goel", "http://github.com/akashdeepgoel"]
 translators:
     - ["Claudson Martins", "https://github.com/claudsonm"]
-lang: pt-br
 ---
 
 # Programação Dinâmica
diff --git a/pt-br/elisp.md b/pt-br/elisp.md
index eb1f87fa..5a01e46a 100644
--- a/pt-br/elisp.md
+++ b/pt-br/elisp.md
@@ -4,7 +4,6 @@ contributors:
     - ["Bastien Guerry", "http://bzg.fr"]
 translators:
     - ["Lucas Tadeu Teixeira", "http://ltt.me"]
-lang: pt-br
 filename: learn-emacs-lisp-pt.el
 ---
 
diff --git a/pt-br/elixir.md b/pt-br/elixir.md
index 083a3fa4..aedb386c 100644
--- a/pt-br/elixir.md
+++ b/pt-br/elixir.md
@@ -5,7 +5,6 @@ contributors:
     - ["Dzianis Dashkevich", "https://github.com/dskecse"]
 translators:
     - ["Rodrigo Muniz", "http://github.com/muniz95"]
-lang: pt-br
 filename: learnelixir-pt.ex
 ---
 
diff --git a/pt-br/elm.md b/pt-br/elm.md
index d2469a93..4c5baff7 100644
--- a/pt-br/elm.md
+++ b/pt-br/elm.md
@@ -4,7 +4,6 @@ contributors:
     - ["Max Goldstein", "http://maxgoldste.in/"]
 translators:
     - ["Marcel dos Santos", "https://twitter.com/marcelgsantos"]
-lang: pt-br
 filename: learnelm-pt.elm
 ---
 
diff --git a/pt-br/emacs.md b/pt-br/emacs.md
index c2511615..cd097dd6 100644
--- a/pt-br/emacs.md
+++ b/pt-br/emacs.md
@@ -6,7 +6,6 @@ contributors:
     - ["Joseph Riad", "https://github.com/Joseph-Riad"]
 translators:
     - ["André de Santa Gabriel", "https://github.com/andredesanta"]
-lang: pt-br
 ---
 
 O Emacs começou sua vida como [gnu.org/software/emacs/emacs-paper.html](https://www.gnu.org/software/emacs/emacs-paper.html) e cresceu
diff --git a/pt-br/erlang.md b/pt-br/erlang.md
index 029e29b5..26fead0f 100644
--- a/pt-br/erlang.md
+++ b/pt-br/erlang.md
@@ -5,7 +5,6 @@ contributors:
     - ["Giovanni Cappellotto", "http://www.focustheweb.com/"]
 translators:
     - ["Guilherme Heuser Prestes", "http://twitter.com/gprestes"]
-lang: pt-br
 ---
 
 ```erlang
diff --git a/pt-br/factor.md b/pt-br/factor.md
index a582c735..f07b5de1 100644
--- a/pt-br/factor.md
+++ b/pt-br/factor.md
@@ -4,7 +4,6 @@ contributors:
     - ["hyphz", "http://github.com/hyphz/"]
 filename: learnfactor-br.factor
 
-lang: pt-br
 ---
 
 Factor é uma linguagem moderna baseada em pilha, baseado em Forth, criada por Slava Pestov.
diff --git a/pt-br/fsharp.md b/pt-br/fsharp.md
index 0fe360c3..ef7a3185 100644
--- a/pt-br/fsharp.md
+++ b/pt-br/fsharp.md
@@ -4,7 +4,6 @@ filename: learnfsharp-pt.fs
 contributors:
     - ["Scott Wlaschin", "http://fsharpforfunandprofit.com"]
     - ["Adelar da Silva Queiróz", "https://adelarsq.github.io"]
-lang: pt-br
 ---
 
 F# é uma linguagem de propósito geral funcional e orientada a objetos. É livre, de código aberto e executa em Linux, Mac, Windows e outros.
diff --git a/pt-br/git.md b/pt-br/git.md
index ce9b7f63..a790692a 100644
--- a/pt-br/git.md
+++ b/pt-br/git.md
@@ -1,7 +1,6 @@
 ---
 category: tool
 tool: Git
-lang: pt-br
 filename: LearnGit-br.txt
 contributors:
     - ["Jake Prather", "http://github.com/JakeHP"]
diff --git a/pt-br/go.md b/pt-br/go.md
index 6d6264e7..af86b540 100644
--- a/pt-br/go.md
+++ b/pt-br/go.md
@@ -2,7 +2,6 @@
 category: language
 language: Go
 filename: learngo-pt.go
-lang: pt-br
 contributors:
     - ["Sonia Keys", "https://github.com/soniakeys"]
     - ["Jose Donizetti", "https://github.com/josedonizetti"]
diff --git a/pt-br/groovy.md b/pt-br/groovy.md
index cb096a71..dfcea20d 100644
--- a/pt-br/groovy.md
+++ b/pt-br/groovy.md
@@ -7,7 +7,6 @@ contributors:
 translators:
     - ["João Farias", "https://github.com/joaogfarias"]
     - ["Marcel Ribeiro-Dantas", "https://github.com/mribeirodantas"]
-lang: pt-br
 ---
 
 Groovy - Uma linguagem dinâmica para a plataforma Java. [Leia mais aqui](http://www.groovy-lang.org/).
diff --git a/pt-br/hack.md b/pt-br/hack.md
index 7f76a9b0..f9f565d9 100644
--- a/pt-br/hack.md
+++ b/pt-br/hack.md
@@ -5,7 +5,6 @@ contributors:
     - ["David Lima", "https://github.com/davelima"]
 translators:
     - ["David Lima", "https://github.com/davelima"]
-lang: pt-br
 filename: learnhack-pt.hh
 ---
 
diff --git a/pt-br/haskell.md b/pt-br/haskell.md
index c55a4c03..04c90254 100644
--- a/pt-br/haskell.md
+++ b/pt-br/haskell.md
@@ -4,7 +4,6 @@ contributors:
     - ["Adit Bhargava", "http://adit.io"]
 translators:
     - ["Lucas Tonussi", "http://www.inf.ufsc.br/~tonussi/"]
-lang: pt-br
 filename: learnhaskell-pt.hs
 ---
 
diff --git a/pt-br/haxe.md b/pt-br/haxe.md
index 83563528..bfaaa350 100644
--- a/pt-br/haxe.md
+++ b/pt-br/haxe.md
@@ -6,7 +6,6 @@ contributors:
     - ["Dan Korostelev", "https://github.com/nadako/"]
 translators:
     - ["David Lima", "https://github.com/davelima/"]
-lang: pt-br
 ---
 
 Haxe é uma linguagem baseada na web que provê suporte a C++, C#, SWF/ActionScript,
diff --git a/pt-br/html.md b/pt-br/html.md
index 8a989ee9..0eb533de 100644
--- a/pt-br/html.md
+++ b/pt-br/html.md
@@ -5,7 +5,6 @@ contributors:
     - ["Christophe THOMAS", "https://github.com/WinChris"]
 translators:
     - ["Robert Steed", "https://github.com/robochat"]
-lang: pt-br
 ---
 
 HTML é um acrônimo de HyperText Markup Language(Linguagem de Marcação de HiperTexto).
diff --git a/pt-br/httpie.md b/pt-br/httpie.md
index 6fb8584b..b6c4f844 100644
--- a/pt-br/httpie.md
+++ b/pt-br/httpie.md
@@ -6,7 +6,6 @@ contributors:
   - ["Adaías Magdiel", "https://github.com/AdaiasMagdiel"]
 translators:
   - ["Adaías Magdiel", "https://adaiasmagdiel.com/"]
-lang: pt-br
 ---
 
 HTTPie é um poderoso cliente HTTP para linha de comando, projetado para uma
diff --git a/pt-br/hy.md b/pt-br/hy.md
index 3a2589e7..57bf7d2a 100644
--- a/pt-br/hy.md
+++ b/pt-br/hy.md
@@ -5,7 +5,6 @@ contributors:
     - ["Abhishek L", "http://twitter.com/abhishekl"]
 translators:
     - ["Miguel Araújo", "https://github.com/miguelarauj1o"]
-lang: pt-br
 ---
 
 Hy é um dialeto de Lisp escrito sobre Python. Isto é possível convertendo
diff --git a/pt-br/java.md b/pt-br/java.md
index 5feda3e5..8f7c46ea 100644
--- a/pt-br/java.md
+++ b/pt-br/java.md
@@ -7,7 +7,6 @@ contributors:
 translators:
     - ["Victor Kléber Santos L. Melo", "http://victormelo.com.br/blog"]
     - ["Renê Douglas N. de Morais", "mailto:rene.douglas.bsi@gmail.com"]
-lang: pt-br
 filename: LearnJava-pt.java
 
 ---
diff --git a/pt-br/javascript.md b/pt-br/javascript.md
index c84c8b9f..c2848474 100644
--- a/pt-br/javascript.md
+++ b/pt-br/javascript.md
@@ -6,7 +6,6 @@ contributors:
     - ["Ariel Krakowski", "http://www.learneroo.com"]
 translators:
     - ["Willian Justen", "http://willianjusten.com.br"]
-lang: pt-br
 ---
 
 JavaScript foi criada por Brendan Eich, funcionário da Netscape na época, em 1995. Ela
diff --git a/pt-br/jquery.md b/pt-br/jquery.md
index 7692bc12..ae0fafd4 100644
--- a/pt-br/jquery.md
+++ b/pt-br/jquery.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Nikolas Silva", "https://github.com/nikolassilva"]
 filename: jquery-pt.js
-lang: pt-br
 ---
 
 jQuery é uma biblioteca JavaScript que te ajuda a "fazer mais, escrevendo menos". Ela faz com que muitas tarefas comuns em JavaScript sejam mais simples de escrever. jQuery é usado por grandes empresas e desenvolvedores do mundo todo. Ela torna o AJAX, manipulação de eventos, manipulação do DOM, entre outros, mais fácil e rápido.
diff --git a/pt-br/json.md b/pt-br/json.md
index 8362fdf7..ba097a44 100644
--- a/pt-br/json.md
+++ b/pt-br/json.md
@@ -6,7 +6,6 @@ contributors:
   - ["Francisco Marques", "https://github.com/ToFran"]
 translators:
   - ["Miguel Araújo", "https://github.com/miguelarauj1o"]
-lang: pt-br
 filename: learnjson-pt.json
 ---
 
diff --git a/pt-br/julia.md b/pt-br/julia.md
index 70c13551..d998a07c 100644
--- a/pt-br/julia.md
+++ b/pt-br/julia.md
@@ -5,7 +5,6 @@ contributors:
     - ["Leah Hanson", "http://leahhanson.us"]
 translators:
     - ["Davidson Mizael", "https://github.com/davidsonmizael"]
-lang: pt-br
 ---
 
 Julia é uma linguagem homoicônica funcional focada na computação técnica. Ao mesmo tempo que ela tem todo o poder dos macros homoicônicos, funções de primeira classe, e controle de baixo nível, Julia é tão fácil para aprender e usar quanto Python.
diff --git a/pt-br/kotlin.md b/pt-br/kotlin.md
index 0524ca63..92ef6893 100644
--- a/pt-br/kotlin.md
+++ b/pt-br/kotlin.md
@@ -5,7 +5,6 @@ contributors:
     - ["S Webber", "https://github.com/s-webber"]
 translators:
     - ["Márcio Torres", "https://github.com/marciojrtorres"]
-lang: pt-br
 ---
 
 Kotlin é uma linguagem de programação estaticamente tipada para a JVM, Android e navegadores web. Ela é 100% interoperável com Java.
diff --git a/pt-br/lambda-calculus.md b/pt-br/lambda-calculus.md
index 8e727eda..e706dae4 100644
--- a/pt-br/lambda-calculus.md
+++ b/pt-br/lambda-calculus.md
@@ -6,7 +6,6 @@ contributors:
     - ["Yan Hui Hang", "http://github.com/yanhh0"]
 translators:
     - ["Gustavo Tramontin", "https://github.com/gustatramontin"]
-lang: pt-br
 ---
 
 # Cálculo Lambda
diff --git a/pt-br/latex.md b/pt-br/latex.md
index 992c187f..bc33d341 100644
--- a/pt-br/latex.md
+++ b/pt-br/latex.md
@@ -9,7 +9,6 @@ contributors:
 translators:
     - ["Paulo Henrique Rodrigues Pinheiro", "https://github.com/paulohrpinheiro"]
     - ["Marcel Ribeiro-Dantas", "https://github.com/mribeirodantas"]
-lang: pt-br
 filename: learn-latex-pt.tex
 ---
 
diff --git a/pt-br/less.md b/pt-br/less.md
index 824f35c3..c6a2282f 100644
--- a/pt-br/less.md
+++ b/pt-br/less.md
@@ -4,7 +4,6 @@ filename: learnless-br.less
 contributors:
   - ["Saravanan Ganesh", "http://srrvnn.me"]
 
-lang: pt-br
 ---
 
 Less é um pré-processador de CSS, que adiciona recursos como variáveis, aninhamento, mixins e muito mais.
diff --git a/pt-br/lua.md b/pt-br/lua.md
index ff0c4834..d91abd84 100644
--- a/pt-br/lua.md
+++ b/pt-br/lua.md
@@ -5,7 +5,6 @@ contributors:
 filename: learnlua-pt.lua
 translators:
     - ["Iaan Mesquita", "https://github.com/ianitow"]
-lang: pt-br
 ---
 
 ```lua
diff --git a/pt-br/make.md b/pt-br/make.md
index 469e1f09..84a31f48 100644
--- a/pt-br/make.md
+++ b/pt-br/make.md
@@ -8,7 +8,6 @@ translators:
     - ["Rogério Gomes Rio", "https://github.com/rogerlista"]
 filename: Makefile-pt
 
-lang: pt-br
 ---
 
 Um Makefile define um gráfico de regras para criar um alvo (ou alvos). Sua finalidade é fazer o mínimo de trabalho necessário para atualizar um alvo para a versão mais recente da fonte. Famosamente escrito ao longo de um fim de semana por Stuart Feldman em 1976, ainda é amplamente usada (particularmente no Unix e no Linux) apesar de muitos concorrentes e críticas.
diff --git a/pt-br/markdown.md b/pt-br/markdown.md
index 0f578ea2..c4360537 100644
--- a/pt-br/markdown.md
+++ b/pt-br/markdown.md
@@ -8,7 +8,6 @@ translators:
     - ["Monique Baptista", "https://github.com/bfmonique"]
     - ["Marcel Ribeiro-Dantas", "https://github.com/mribeirodantas"]
 
-lang: pt-br
 filename: learnmarkdown-pt.md
 ---
 
diff --git a/pt-br/matlab.md b/pt-br/matlab.md
index 7da4aea4..7c87564c 100644
--- a/pt-br/matlab.md
+++ b/pt-br/matlab.md
@@ -6,7 +6,6 @@ contributors:
     - ["Colton Kohnke", "http://github.com/voltnor"]
 translators:
     - ["Claudson Martins", "https://github.com/claudsonm"]
-lang: pt-br
 filename: learnmatlab-pt.mat
 ---
 
diff --git a/pt-br/p5.md b/pt-br/p5.md
index 4b843c24..7f56dd83 100644
--- a/pt-br/p5.md
+++ b/pt-br/p5.md
@@ -7,7 +7,6 @@ contributors:
     - ['Claudio Busatto', 'https://github.com/cjcbusatto']
 translators:
     - ["Adaías Magdiel", "https://adaiasmagdiel.com/"]
-lang: pt-br
 ---
 
 p5.js é biblioteca JavaScript que carrega o princípio original do [Processing](https://processing.org), tornar a programação acessível à artistas, designers, professores e alunos e traz esse lema para os dias atuais.
diff --git a/pt-br/paren.md b/pt-br/paren.md
index 92414ba3..a23100e9 100644
--- a/pt-br/paren.md
+++ b/pt-br/paren.md
@@ -5,7 +5,6 @@ contributors:
   - ["KIM Taegyoon", "https://github.com/kimtg"]
 translators:
     - ["Claudson Martins", "https://github.com/claudsonm"]
-lang: pt-br
 ---
 
 [Paren](https://bitbucket.org/ktg/paren) é um dialeto do Lisp. É projetado para ser uma linguagem embutida.
diff --git a/pt-br/pascal.md b/pt-br/pascal.md
index 15a92908..65a49414 100644
--- a/pt-br/pascal.md
+++ b/pt-br/pascal.md
@@ -7,7 +7,6 @@ contributors:
     - ["Raul Almeida", "https://github.com/almeidaraul"]
 translators:
     - ["Raul Almeida", "https://github.com/almeidaraul"]
-lang: pt-br
 ---
 
 
diff --git a/pt-br/perl.md b/pt-br/perl.md
index 32df11fc..969a82e5 100644
--- a/pt-br/perl.md
+++ b/pt-br/perl.md
@@ -6,7 +6,6 @@ contributors:
     - ["Korjavin Ivan", "http://github.com/korjavin"]
 translators:
     - ["Miguel Araújo", "https://github.com/miguelarauj1o"]
-lang: pt-br
 ---
 
 Perl é, uma linguagem de programação altamente capaz, rica em recursos, com mais de 25 anos de desenvolvimento.
diff --git a/pt-br/php-composer.md b/pt-br/php-composer.md
index ad935425..fccf90a3 100644
--- a/pt-br/php-composer.md
+++ b/pt-br/php-composer.md
@@ -5,7 +5,6 @@ contributors:
     - ["Brett Taylor", "https://github.com/glutnix"]
 translators:
     - ["David Lima", "https://github.com/davelima"]
-lang: pt-br
 filename: LearnComposer-pt.sh
 ---
 
diff --git a/pt-br/php.md b/pt-br/php.md
index dd2ebcf1..8f86270e 100644
--- a/pt-br/php.md
+++ b/pt-br/php.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Abdala Cerqueira", "http://abda.la"]
     - ["Raquel Diniz", "http://twitter.com/raquelrdiniz"]
-lang: pt-br
 filename: learnphp-pt.php
 ---
 
diff --git a/pt-br/processing.md b/pt-br/processing.md
index 4ed80dbb..114b08f6 100644
--- a/pt-br/processing.md
+++ b/pt-br/processing.md
@@ -6,7 +6,6 @@ contributors:
     - ["Divay Prakash", "https://github.com/divayprakash"]
 translators:
     - ["Kemel Zaidan", "https://github.com/kemelzaidan"]
-lang: pt-br
 ---
 
 ## Introdução
diff --git a/pt-br/pug.md b/pt-br/pug.md
index 05deedb6..02623a27 100644
--- a/pt-br/pug.md
+++ b/pt-br/pug.md
@@ -5,7 +5,6 @@ contributors:
 filename: index-pt.pug
 translators:
   - ["Adaías Magdiel", "https://adaiasmagdiel.com/"]
-lang: pt-br
 ---
 
 Pug é uma pequena linguagem que compila para HTML. Possui uma sintaxe limpa
diff --git a/pt-br/pyqt.md b/pt-br/pyqt.md
index ded898a7..faeda9c9 100644
--- a/pt-br/pyqt.md
+++ b/pt-br/pyqt.md
@@ -6,7 +6,6 @@ contributors:
     - ["Nathan Hughes", "https://github.com/sirsharpest"]
 translators:
     - ["Lucas Pugliesi", "https://github.com/fplucas"]
-lang: pt-br
 ---
 
 **Qt** é amplamente conhecido como um framework para desenvolvimento de
diff --git a/pt-br/python.md b/pt-br/python.md
index db14923c..290c20b9 100644
--- a/pt-br/python.md
+++ b/pt-br/python.md
@@ -8,7 +8,6 @@ contributors:
 translators:
     - ["Paulo Henrique Rodrigues Pinheiro", "http://www.sysincloud.it"]
     - ["Monique Baptista", "https://github.com/bfmonique"]
-lang: pt-br
 filename: learnpython-pt.py
 ---
 
diff --git a/pt-br/pythonlegacy.md b/pt-br/pythonlegacy.md
index 53cdc92e..c6b769f3 100644
--- a/pt-br/pythonlegacy.md
+++ b/pt-br/pythonlegacy.md
@@ -4,7 +4,6 @@ contributors:
     - ["Louie Dinh", "http://ldinh.ca"]
 translators:
     - ["Vilson Vieira", "http://automata.cc"]
-lang: pt-br
 filename: learnpythonlegacy-pt.py
 ---
 
diff --git a/pt-br/pythonstatcomp.md b/pt-br/pythonstatcomp.md
index 36a26075..01b4d6da 100644
--- a/pt-br/pythonstatcomp.md
+++ b/pt-br/pythonstatcomp.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["waltercjunior", "https://github.com/waltercjunior"]
 filename: pythonstatcomp-pt.py
-lang: pt-br
 ---
 
 Este é um tutorial sobre como fazer algumas tarefas típicas de programação estatística usando Python.
diff --git a/pt-br/qt.md b/pt-br/qt.md
index 55e2c17b..c5a30cfc 100644
--- a/pt-br/qt.md
+++ b/pt-br/qt.md
@@ -7,7 +7,6 @@ contributors:
     - ["Aleksey Kholovchuk", "https://github.com/vortexxx192"]
 translators:
     - ["Lucas Pugliesi", "https://github.com/fplucas"]
-lang: pt-br
 ---
 
 **Qt** é amplamente conhecido como um framework para desenvolvimento de
diff --git a/pt-br/r.md b/pt-br/r.md
index ad3734e5..aabc62a2 100644
--- a/pt-br/r.md
+++ b/pt-br/r.md
@@ -6,7 +6,6 @@ contributors:
     - ["kalinn", "http://github.com/kalinn"]
 translators:
     - ["Marcel Ribeiro-Dantas", "http://github.com/mribeirodantas"]
-lang: pt-br    
 filename: learnr-pt.r
 ---
 
diff --git a/pt-br/ruby-ecosystem.md b/pt-br/ruby-ecosystem.md
index 7b7094bc..ed0d6a61 100644
--- a/pt-br/ruby-ecosystem.md
+++ b/pt-br/ruby-ecosystem.md
@@ -6,7 +6,6 @@ contributors:
     - ["Rafal Chmiel", "http://github.com/rafalchmiel"]
 translators:
     - ["Claudson Martins", "http://github.com/claudsonm"]
-lang: pt-br
 
 ---
 
diff --git a/pt-br/ruby.md b/pt-br/ruby.md
index 6a5aa38f..5117bc04 100644
--- a/pt-br/ruby.md
+++ b/pt-br/ruby.md
@@ -1,6 +1,5 @@
 ---
 language: Ruby
-lang: pt-br
 filename: learnruby-pt.rb
 contributors:
   - ["Bruno Henrique - Garu", "http://garulab.com"]
diff --git a/pt-br/rust.md b/pt-br/rust.md
index 246450e9..085932d3 100644
--- a/pt-br/rust.md
+++ b/pt-br/rust.md
@@ -3,7 +3,6 @@ language: Rust
 filename: rust-pt.rs
 contributors:
     - ["Paulo Henrique Rodrigues Pinheiro", "https://about.me/paulohrpinheiro"]
-lang: pt-br
 
 ---
 
diff --git a/pt-br/sass.md b/pt-br/sass.md
index 6a843427..0a6d29a2 100644
--- a/pt-br/sass.md
+++ b/pt-br/sass.md
@@ -8,7 +8,6 @@ contributors:
 translators:
   - ["Gabriel Gomes", "https://github.com/gabrielgomesferraz"]
   - ["Cássio Böck", "https://github.com/cassiobsilva"]
-lang: pt-br
 ---
 
 Sass é uma linguagem de extensão CSS que adiciona recursos, como variáveis, aninhamento, mixins e muito mais.
diff --git a/pt-br/scala.md b/pt-br/scala.md
index 92400670..2697b563 100644
--- a/pt-br/scala.md
+++ b/pt-br/scala.md
@@ -8,7 +8,6 @@ contributors:
     - ["Ha-Duong Nguyen", "http://reference-error.org"]
 translators:
     - ["Francieli Viane", "https://github.com/FFrancieli"]
-lang: pt-br
 ---
 
 Scala - a linguagem escalável
diff --git a/pt-br/self.md b/pt-br/self.md
index cef7ce79..3e8ad631 100644
--- a/pt-br/self.md
+++ b/pt-br/self.md
@@ -4,7 +4,6 @@ contributors:
     - ["Russell Allen", "http://github.com/russellallen"]
 translators:
     - ["Ricardo de Almeida Gonzaga", "http://github.com/ricardotk"]
-lang: pt-br
 filename: learnself-br.self
 ---
 
diff --git a/pt-br/set-theory.md b/pt-br/set-theory.md
index 3ec75510..98bfb76a 100644
--- a/pt-br/set-theory.md
+++ b/pt-br/set-theory.md
@@ -1,7 +1,6 @@
 ---
 category: Algorithms & Data Structures
 name: Set theory
-lang: pt-br
 contributors:
     - ["Andrew Ryan Davis", "https://github.com/AndrewDavis1191"]
 translators:
diff --git a/pt-br/solidity.md b/pt-br/solidity.md
index 3825513c..282eb3cb 100644
--- a/pt-br/solidity.md
+++ b/pt-br/solidity.md
@@ -6,7 +6,6 @@ contributors:
   - ["Joseph Chow", ""]
 translators:
     - ["João Farias", "http://thatsabug.com/"]
-lang: pt-br
 ---
 
 Solidity permite você programar para a [Ethereum](https://www.ethereum.org/),
diff --git a/pt-br/sql.md b/pt-br/sql.md
index 6b9b44a5..e41cc2eb 100644
--- a/pt-br/sql.md
+++ b/pt-br/sql.md
@@ -5,7 +5,6 @@ contributors:
   - ["Bob DuCharme", "http://bobdc.com/"]
 translators:
   - ["jovinoguerrero", "https://github.com/jovinoguerrero"]
-lang: pt-br
 ---
 
 A linguagem de consulta estruturada (SQL em inglês) é uma linguagem padrão ISO para criar e trabalhar com bancos de dados armazenados num conjunto de tabelas. As implementações geralmente adicionam suas próprias extensões à linguagem; [Comparação entre diferentes implementações de SQL](http://troels.arvin.dk/db/rdbms/) é uma boa referência sobre as diferenças entre os diferentes produtos.
diff --git a/pt-br/stylus.md b/pt-br/stylus.md
index 3fa6c994..4a82a47b 100644
--- a/pt-br/stylus.md
+++ b/pt-br/stylus.md
@@ -4,7 +4,6 @@ filename: learnStylus-pt.styl
 contributors:
   - ["Salomão Neto", "https://github.com/salomaosnff"]
   - ["Isaac Henrique", "https://github.com/Isaachi1"]
-lang: pt-br
 ---
 
 Stylus tem como propósito, adicionar funcionalidades às suas folhas de estilos CSS que te ajudam no desenvolvimento, sem que haja a quebra de compartibilidade entre os navegadores Web.
diff --git a/pt-br/swift.md b/pt-br/swift.md
index 671bdb88..135d8263 100644
--- a/pt-br/swift.md
+++ b/pt-br/swift.md
@@ -6,7 +6,6 @@ contributors:
     - ["Christopher Bess", "http://github.com/cbess"]
 translators:
     - ["Mariane Siqueira Machado", "https://twitter.com/mariane_sm"]
-lang: pt-br
 
 ---
 
diff --git a/pt-br/tmux.md b/pt-br/tmux.md
index f3764b1f..0fb15f31 100644
--- a/pt-br/tmux.md
+++ b/pt-br/tmux.md
@@ -5,7 +5,6 @@ contributors:
     - ["mdln", "https://github.com/mdln"]
 translators:
     - ["Luis Custodio", "http://luiscustodio.com"]
-lang: pt-br
 filename: LearnTmux-pt.txt
 ---
 
diff --git a/pt-br/toml.md b/pt-br/toml.md
index d95b4bac..2d4a2aff 100644
--- a/pt-br/toml.md
+++ b/pt-br/toml.md
@@ -5,7 +5,6 @@ contributors:
   - ["Alois de Gouvello", "https://github.com/aloisdg"]
 translators:
   - ["Adaías Magdiel", "https://adaiasmagdiel.com/"]
-lang: pt-br
 ---
 
 TOML significa Tom's Obvious, Minimal Language. É uma linguagem de serialização de dados projetada para ser um formato de arquivo de configuração mínimo que é fácil de ler devido à semântica óbvia.
diff --git a/pt-br/typescript.md b/pt-br/typescript.md
index 0fe9f8db..afe00b02 100644
--- a/pt-br/typescript.md
+++ b/pt-br/typescript.md
@@ -5,7 +5,6 @@ contributors:
     - ["Philippe Vlérick", "https://github.com/pvlerick"]
 translators:
   - ["Gabriel Gomes", "https://github.com/gabrielgomesferraz"]
-lang: pt-br
 ---
 
 Typescript é uma linguagem que visa facilitar o desenvolvimento de aplicações em grande escala escritos em JavaScript.
diff --git a/pt-br/vim.md b/pt-br/vim.md
index bf8d3eef..c95ebc11 100644
--- a/pt-br/vim.md
+++ b/pt-br/vim.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["David Lima", "https://github.com/davelima"]
     - ["Raul Almeida", "https://github.com/almeidaraul"]
-lang: pt-br
 filename: LearnVim-pt.txt
 ---
 
diff --git a/pt-br/visualbasic.md b/pt-br/visualbasic.md
index 9b8dcf87..9857612b 100644
--- a/pt-br/visualbasic.md
+++ b/pt-br/visualbasic.md
@@ -4,7 +4,6 @@ contributors:
     - ["Brian Martin", "http://brianmartin.biz"]
 translators:
     - ["AdrianoJP", "https://github.com/AdrianoJP"]
-lang: pt-br
 filename: learnvisualbasic-pt.vb
 ---
 
diff --git a/pt-br/xml.md b/pt-br/xml.md
index cbc1668a..9f336c75 100644
--- a/pt-br/xml.md
+++ b/pt-br/xml.md
@@ -5,7 +5,6 @@ contributors:
     - ["João Farias", "https://github.com/JoaoGFarias"]
 translators:
     - ["Miguel Araújo", "https://github.com/miguelarauj1o"]
-lang: pt-br
 ---
 
 XML é uma linguagem de marcação projetada para armazenar e transportar dados.
diff --git a/pt-br/yaml.md b/pt-br/yaml.md
index 1c38d0bd..4830ab96 100644
--- a/pt-br/yaml.md
+++ b/pt-br/yaml.md
@@ -6,7 +6,6 @@ contributors:
 translators:
   - ["Rodrigo Russo", "https://github.com/rodrigozrusso"]
 filename: learnyaml-pt.yaml
-lang: pt-br
 ---
 
 YAML é uma linguagem de serialização de dados projetado para ser diretamente gravável e
diff --git a/pt-pt/bf.md b/pt-pt/bf.md
index 3eaa6d24..f31baa83 100644
--- a/pt-pt/bf.md
+++ b/pt-pt/bf.md
@@ -6,7 +6,6 @@ contributors:
     - ["Mathias Bynens", "http://mathiasbynens.be/"]
 translators:
     - ["Joao Marques", "http://github.com/mrshankly"]
-lang: pt-pt
 ---
 
 Brainfuck (não capitalizado excepto no início de uma frase) é uma linguagem de
diff --git a/pt-pt/git.md b/pt-pt/git.md
index aa42fa29..58302f97 100644
--- a/pt-pt/git.md
+++ b/pt-pt/git.md
@@ -1,7 +1,6 @@
 ---
 category: tool
 tool: Git
-lang: pt-pt
 filename: LearnGit-pt.txt
 contributors:
     - ["Jake Prather", "http://github.com/JakeHP"]
diff --git a/pt-pt/kotlin.md b/pt-pt/kotlin.md
index ba30df40..52989fd8 100644
--- a/pt-pt/kotlin.md
+++ b/pt-pt/kotlin.md
@@ -1,7 +1,6 @@
 ---
 language: Kotlin
 filename: LearnKotlin-pt.kt
-lang: pt-pt
 contributors:
     - ["S Webber", "https://github.com/s-webber"]
 translators:
diff --git a/pt-pt/scala.md b/pt-pt/scala.md
index b7d1f18e..66a38caf 100644
--- a/pt-pt/scala.md
+++ b/pt-pt/scala.md
@@ -8,7 +8,6 @@ contributors:
     - ["Ha-Duong Nguyen", "http://reference-error.org"]
 translators:
     - ["João Costa", "http://joaocosta.eu"]
-lang: pt-pt
 ---
 
 Scala - a linguagem escalável
diff --git a/pt-pt/swift.md b/pt-pt/swift.md
index 4a5aac5d..097a9308 100644
--- a/pt-pt/swift.md
+++ b/pt-pt/swift.md
@@ -9,7 +9,6 @@ contributors:
   - ["Clayton Walker", "https://github.com/cwalk"]
 translators:
   - ["João Costa", "https://github.com/joaofcosta"]
-lang: pt-pt
 ---
 
 Swift é uma linguagem de programação criada pela Apple para o desenvolvimento em iOS e macOS.
diff --git a/qml.md b/qml.md
index 63b49d61..634442f9 100644
--- a/qml.md
+++ b/qml.md
@@ -3,7 +3,6 @@ language: QML
 contributors:
     - ["Furkan Uzumcu", "https://zmc.space/"]
 filename: learnqml.qml
-lang: en-us
 ---
 
 ```qml
diff --git a/ro/bash.md b/ro/bash.md
index 03b9f559..9a1dcc68 100644
--- a/ro/bash.md
+++ b/ro/bash.md
@@ -7,7 +7,6 @@ contributors:
     - ["Denis Arh", "https://github.com/darh"]
 translators:
     - ["Adrian Bordinc", "https://github.com/ellimist"]
-lang: ro-ro
 filename: LearnBash-ro.sh
 ---
 
diff --git a/ro/bf.md b/ro/bf.md
index b2bfa88b..865429e0 100644
--- a/ro/bf.md
+++ b/ro/bf.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Petru Dimitriu", "http://petru-dimitriu.github.io"]
 filename: bf-ro.bf
-lang: ro-ro
 ---
 
 Brainfuck (un nume propriu care nu primește majusculă inițială decât la începutul
diff --git a/ro/clojure.md b/ro/clojure.md
index e4abb7b9..0e65f369 100644
--- a/ro/clojure.md
+++ b/ro/clojure.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Bogdan Paun", "http://twitter.com/bgdnpn"]
 filename: learnclojure-ro.clj
-lang: ro-ro
 ---
 
 Clojure este un limbaj din familia Lisp dezvoltat pentru Masina Virtuala Java
diff --git a/ro/coffeescript.md b/ro/coffeescript.md
index 2a962dfc..9b36f32b 100644
--- a/ro/coffeescript.md
+++ b/ro/coffeescript.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Bogdan Lazar", "http://twitter.com/tricinel"]
 filename: coffeescript-ro.coffee
-lang: ro-ro
 ---
 
 CoffeeScript este un limbaj de programare care este compilat in JavaScript. Nu exista un interpretator la runtime-ul aplicatiei. Fiind unul din successorii JavaScript, CoffeeScript incearca sa compileze JavaScript usor de citit si performant.
diff --git a/ro/elixir.md b/ro/elixir.md
index 2c05fd27..f1af9c5e 100644
--- a/ro/elixir.md
+++ b/ro/elixir.md
@@ -7,7 +7,6 @@ contributors:
     - ["Ev Bogdanov", "https://github.com/evbogdanov"]
 translators:
     - ["Vitalie Lazu", "https://github.com/vitaliel"]
-lang: ro-ro
 filename: learnelixir-ro.ex
 ---
 
diff --git a/ro/haskell.md b/ro/haskell.md
index f0d9cea0..4031ce1c 100644
--- a/ro/haskell.md
+++ b/ro/haskell.md
@@ -4,7 +4,6 @@ contributors:
     - ["Adit Bhargava", "http://adit.io"]
 translators:
     - ["Petru Dimitriu", "http://petru-dimitriu.github.io"]
-lang: ro-ro
 filename: haskell-ro.hs
 ---
 
diff --git a/ro/json.md b/ro/json.md
index 5a1ba0eb..91a97cb4 100644
--- a/ro/json.md
+++ b/ro/json.md
@@ -6,7 +6,6 @@ contributors:
   - ["Marco Scannadinari", "https://github.com/marcoms"]
 translators:
     - ["Serban Constantin", "https://github.com/fuzzmz"]
-lang: ro-ro
 ---
 
 Deoarece JSON este un fromat foarte simplu de schimb de date acesta va fi
diff --git a/ro/latex.md b/ro/latex.md
index a08439e1..6ee487ff 100644
--- a/ro/latex.md
+++ b/ro/latex.md
@@ -8,7 +8,6 @@ contributors:
 translators:
     - ["Petru Dimitriu", "http://petru-dimitriu.github.io"]
 filename: learn-latex-ro.tex
-lang: ro-ro
 ---
 
 ```tex
diff --git a/ro/pythonlegacy.md b/ro/pythonlegacy.md
index ab266954..cf93ec83 100644
--- a/ro/pythonlegacy.md
+++ b/ro/pythonlegacy.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Ovidiu Ciule", "https://github.com/ociule"]
 filename: learnpythonlegacy-ro.py
-lang: ro-ro
 ---
 
 Python a fost creat de Guido Van Rossum la începutul anilor '90. Python a
diff --git a/ro/ruby.md b/ro/ruby.md
index da35e3ee..83c16720 100644
--- a/ro/ruby.md
+++ b/ro/ruby.md
@@ -10,7 +10,6 @@ contributors:
 translators:
   - ["Adrian Bordinc", "https://github.com/ellimist"]
 filename: learnruby-ro.rb
-lang: ro-ro
 ---
 
 ```ruby
diff --git a/ro/xml.md b/ro/xml.md
index 9ab2eee0..523c55e7 100644
--- a/ro/xml.md
+++ b/ro/xml.md
@@ -5,7 +5,6 @@ contributors:
   - ["João Farias", "https://github.com/JoaoGFarias"]
 translators:
     - ["Serban Constantin", "https://github.com/fuzzmz"]
-lang: ro-ro
 ---
 
 XML este un limbaj de markup ce are ca scop stocarea si transportul de date.
diff --git a/ru/asymptotic-notation.md b/ru/asymptotic-notation.md
index 02ebd205..c18e37fd 100644
--- a/ru/asymptotic-notation.md
+++ b/ru/asymptotic-notation.md
@@ -6,7 +6,6 @@ contributors:
     - ["Divay Prakash", "http://github.com/divayprakash"]
 translators:
     - ["pru-mike", "http://github.com/pru-mike"]
-lang: ru-ru
 ---
 
 # О-символика
diff --git a/ru/bash.md b/ru/bash.md
index c0853432..de289944 100644
--- a/ru/bash.md
+++ b/ru/bash.md
@@ -20,7 +20,6 @@ translators:
     - ["Andrey Samsonov", "https://github.com/kryzhovnik"]
     - ["Andre Polykanine", "https://github.com/Menelion"]
 filename: LearnBash-ru.sh
-lang: ru-ru
 ---
 
 Bash — это командная оболочка unix, которая распространялась как оболочка
diff --git a/ru/bf.md b/ru/bf.md
index c42d9a52..b6a9e80e 100644
--- a/ru/bf.md
+++ b/ru/bf.md
@@ -6,7 +6,6 @@ contributors:
     - ["Mathias Bynens", "http://mathiasbynens.be/"]
 translators:
     - ["Dmitry Bessonov", "https://github.com/TheDmitry"]
-lang: ru-ru
 ---
 
 Brainfuck (пишется маленькими буквами, кроме начала предложения) - это очень
diff --git a/ru/c++.md b/ru/c++.md
index 71c30508..49d142f5 100644
--- a/ru/c++.md
+++ b/ru/c++.md
@@ -8,7 +8,6 @@ contributors:
     - ["Connor Waters", "http://github.com/connorwaters"]
 translators:
     - ["Bohdan Shtepan", "http://modern-dev.com"]
-lang: ru-ru
 ---
 
 C++ - компилируемый, статически типизированный язык программирования общего назначения, который,
diff --git a/ru/c.md b/ru/c.md
index f376054d..53a08f07 100644
--- a/ru/c.md
+++ b/ru/c.md
@@ -6,7 +6,6 @@ contributors:
     - ["Árpád Goretity", "http://twitter.com/H2CO3_iOS"]
 translators:
     - ["Evlogy Sutormin", "http://evlogii.com"]
-lang: ru-ru
 ---
 
 Что ж, Си всё ещё является лидером среди современных высокопроизводительных языков.
diff --git a/ru/clojure.md b/ru/clojure.md
index 52480d3f..fa8052e9 100644
--- a/ru/clojure.md
+++ b/ru/clojure.md
@@ -5,7 +5,6 @@ contributors:
     - ["Adam Bard", "http://adambard.com/"]
 translators:
     - ["Alexey Pirogov", "http://twitter.com/alex_pir"]
-lang: ru-ru
 ---
 
 Clojure — это представитель семейства Lisp-подобных языков, разработанный
diff --git a/ru/coffeescript.md b/ru/coffeescript.md
index ebac9f22..9b24985e 100644
--- a/ru/coffeescript.md
+++ b/ru/coffeescript.md
@@ -6,7 +6,6 @@ contributors:
 translators:
   - ["asaskevich", "http://github.com/asaskevich"]
 filename: learncoffee-ru.coffee
-lang: ru-ru
 ---
 
 CoffeeScript - это небольшой язык, который компилируется один-в-один в эквивалентный код на языке JavaScript, а потому он не интерпретируется во время исполнения JavaScript кода.
diff --git a/ru/common-lisp.md b/ru/common-lisp.md
index 5878dfe9..c6329138 100644
--- a/ru/common-lisp.md
+++ b/ru/common-lisp.md
@@ -7,7 +7,6 @@ contributors:
   - ["Rommel Martinez", "https://ebzzry.io"]
 translators:
   - ["Michael Filonenko", "https://github.com/filonenko-mikhail"]
-lang: ru-ru
 ---
 
 Common Lisp - мультипарадигменный язык программирования общего назначения, подходящий для широкого
diff --git a/ru/crystal.md b/ru/crystal.md
index 3f2e9c98..a09608b5 100644
--- a/ru/crystal.md
+++ b/ru/crystal.md
@@ -6,7 +6,6 @@ contributors:
     - ["Arnaud Fernandés", "https://github.com/TechMagister/"]
 translators:
     - ["Den Patin", "https://github.com/denpatin"]
-lang: ru-ru
 ---
 
 ```crystal
diff --git a/ru/css.md b/ru/css.md
index 757d5d90..9f6e11d1 100644
--- a/ru/css.md
+++ b/ru/css.md
@@ -5,7 +5,6 @@ contributors:
     - ["Marco Scannadinari", "https://github.com/marcoms"]
     - ["Geoffrey Liu", "https://github.com/g-liu"]
 filename: learncss-ru.css
-lang: ru-ru
 ---
 
 В свои ранние дни веб состоял в основном из чистого текста. С развитием браузеров
diff --git a/ru/d.md b/ru/d.md
index 2a28aa88..c2e8cc98 100644
--- a/ru/d.md
+++ b/ru/d.md
@@ -5,7 +5,6 @@ contributors:
     - ["Anton Pastukhov", "https://anton9.com/"]
     - ["Robert Brights-Gray", "https://lhs.su/"]
     - ["Andre Polykanine", "https://oire.me/"]
-lang: ru-ru
 ---
 
 D - современный компилируемый язык общего назначения с Си-подобным синтаксисом,
diff --git a/ru/dynamic-programming.md b/ru/dynamic-programming.md
index 0b823b2d..e95defce 100644
--- a/ru/dynamic-programming.md
+++ b/ru/dynamic-programming.md
@@ -6,7 +6,6 @@ contributors:
     - ["Miltiadis Stouras", "https://github.com/mstou"]
 translators:
     - ["Albina Gimaletdinova", "https://github.com/albina-astr"]
-lang: ru-ru
 ---
 
 # Динамическое программирование
diff --git a/ru/elixir.md b/ru/elixir.md
index d1e7725c..6d99c56f 100644
--- a/ru/elixir.md
+++ b/ru/elixir.md
@@ -7,7 +7,6 @@ contributors:
 translator:
     - ["Ev Bogdanov", "https://github.com/evbogdanov"]
 filename: learnelixir-ru.ex
-lang: ru-ru
 ---
 
 Elixir — современный функциональный язык программирования, который работает на
diff --git a/ru/erlang.md b/ru/erlang.md
index c8ee0f67..60f2c67b 100644
--- a/ru/erlang.md
+++ b/ru/erlang.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Nikita Kalashnikov", "https://root.yuuzukiyo.net/"]
 filename: learnerlang-ru.erl
-lang: ru-ru
 ---
 
 ```erlang
diff --git a/ru/forth.md b/ru/forth.md
index 21ed26c6..cfdc8851 100644
--- a/ru/forth.md
+++ b/ru/forth.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Dmitrii Kuznetsov", "https://github.com/torgeek"]
 filename: learnforth-ru.fs
-lang: ru-ru
 ---
 
 Форт создан Чарлзом Муром в 70-е годы. Это императивный, стековый язык
diff --git a/ru/go.md b/ru/go.md
index 22249a6e..93d7504f 100644
--- a/ru/go.md
+++ b/ru/go.md
@@ -9,7 +9,6 @@ contributors:
 translators:
     - ["Artem Medeusheyev", "https://github.com/armed"]
     - ["Valery Cherepanov", "https://github.com/qumeric"]
-lang: ru-ru
 ---
 
 Go - это язык общего назначения, целью которого является удобство, простота,
diff --git a/ru/haml.md b/ru/haml.md
index 2dece7e3..f398c937 100644
--- a/ru/haml.md
+++ b/ru/haml.md
@@ -6,7 +6,6 @@ contributors:
     - ["Vasiliy Petrov", "https://github.com/Saugardas"]
 translators:
     - ["Vasiliy Petrov", "https://github.com/Saugardas"]
-lang: ru-ru
 ---
 
 Haml - язык разметки (в основном используемый с Ruby), с помощью которого могут быть легко описаны HTML-документы.
diff --git a/ru/haskell.md b/ru/haskell.md
index 2846c33e..e7d14022 100644
--- a/ru/haskell.md
+++ b/ru/haskell.md
@@ -5,7 +5,6 @@ contributors:
     - ["Adit Bhargava", "http://adit.io"]
 translators:
     - ["Aleksey Pirogov", "http://astynax.github.io"]
-lang: ru-ru
 ---
 
 Haskell разрабатывался, как чистый функциональный язык программирования, применимый на практике. Язык известен благодаря своей системе типов, и "знаменит" благодаря монадам. [Меня][author] же Haskell заставляет возвращаться к себе снова и снова именно своей элегантностью и [я][author] получаю истинное удовольствие, программируя на Haskell.
diff --git a/ru/html.md b/ru/html.md
index 0aee96b7..aed7cca4 100644
--- a/ru/html.md
+++ b/ru/html.md
@@ -5,7 +5,6 @@ contributors:
     - ["Christophe THOMAS", "https://github.com/WinChris"]
 translators:
     - ["Lana Tim", "https://github.com/LanaTim"]
-lang: ru-ru
 ---
 
 HTML расшифровывается как Hypertext Markup Language (гипертекстовый язык разметки).
diff --git a/ru/java.md b/ru/java.md
index adc346cb..8929da92 100644
--- a/ru/java.md
+++ b/ru/java.md
@@ -6,7 +6,6 @@ contributors:
     - ["Madison Dickson", "http://github.com/mix3d"]
 translators:
     - ["Sergey Gaykov", "https://github.com/gaykov"]
-lang: ru-ru
 
 ---
 
diff --git a/ru/javascript.md b/ru/javascript.md
index fefa3b16..be390697 100644
--- a/ru/javascript.md
+++ b/ru/javascript.md
@@ -7,7 +7,6 @@ filename: javascript-ru.js
 translators:
   - ["Alexey Gonchar", "http://github.com/finico"]
   - ["Andre Polykanine", "https://github.com/Oire"]
-lang: ru-ru
 ---
 
 JavaScript был создан в 1995 году Бренданом Айком, работавшим в компании Netscape.
diff --git a/ru/jquery.md b/ru/jquery.md
index 81468a0f..05730a2f 100644
--- a/ru/jquery.md
+++ b/ru/jquery.md
@@ -5,7 +5,6 @@ contributors:
     - ["Sawyer Charles", "https://github.com/xssc"]
 translators:
     - ["Ev Bogdanov", "https://github.com/evbogdanov"]
-lang: ru-ru
 filename: jquery-ru.js
 ---
 
diff --git a/ru/json.md b/ru/json.md
index f7f8cd07..c808560a 100644
--- a/ru/json.md
+++ b/ru/json.md
@@ -6,7 +6,6 @@ contributors:
   - ["Marco Scannadinari", "https://github.com/marcoms"]
 translators:
   - ["Dmitry Bessonov", "https://github.com/TheDmitry"]
-lang: ru-ru
 ---
 
 JSON - это очень простой формат обмена данными, и это будет самый легкий
diff --git a/ru/julia.md b/ru/julia.md
index ac5cc3df..c23583a6 100644
--- a/ru/julia.md
+++ b/ru/julia.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Sergey Skovorodkin", "https://github.com/skovorodkin"]
 filename: learnjulia-ru.jl
-lang: ru-ru
 ---
 
 Julia — гомоиконный функциональный язык программирования для технических расчётов.
diff --git a/ru/kotlin.md b/ru/kotlin.md
index afbaafea..d9bf893a 100644
--- a/ru/kotlin.md
+++ b/ru/kotlin.md
@@ -1,7 +1,6 @@
 ---
 language: Kotlin
 filename: LearnKotlin-ru.kt
-lang: ru-ru
 contributors:
     - ["S Webber", "https://github.com/s-webber"]
 translators:
diff --git a/ru/linker.md b/ru/linker.md
index 1d880ca1..67a3b97a 100644
--- a/ru/linker.md
+++ b/ru/linker.md
@@ -5,7 +5,6 @@ contributors:
     - ["Alexander Kovalchuk", "https://github.com/Zamuhrishka"]
 translators:
     - ["Alexander Kovalchuk", "https://github.com/Zamuhrishka"]
-lang: ru-ru
 ---
 
 # Основные понятия и определения
diff --git a/ru/lua.md b/ru/lua.md
index ff1dc77a..c73d483a 100644
--- a/ru/lua.md
+++ b/ru/lua.md
@@ -8,7 +8,6 @@ translators:
     - ["Max Truhonin", "https://vk.com/maximmax42"]
     - ["Konstantin Gromyko", "https://vk.com/id0x1765d79"]
     - ["Stanislav Gromov", "https://vk.com/id156354391"]
-lang: ru-ru
 ---
 
 ```lua
diff --git a/ru/markdown.md b/ru/markdown.md
index d5b87cb4..7ec00d3d 100644
--- a/ru/markdown.md
+++ b/ru/markdown.md
@@ -7,7 +7,6 @@ translators:
     - ["Pirogov Alexey", "http://twitter.com/alex_pir"]
     - ["Andre Polykanine", "https://github.com/Oire"]
 filename: markdown-ru.md
-lang: ru-ru
 ---
 
 Язык разметки Markdown создан Джоном Грубером (англ. John Gruber)
diff --git a/ru/nim.md b/ru/nim.md
index 09784792..42763462 100644
--- a/ru/nim.md
+++ b/ru/nim.md
@@ -7,7 +7,6 @@ contributors:
 translators:
     - ["Nomadic", "https://github.com/n0madic"]
     - ["dvska", "https://github.com/dvska"]
-lang: ru-ru
 ---
 
 Nim (ранее известный, как Nimrod) — язык программирования со статической
diff --git a/ru/objective-c.md b/ru/objective-c.md
index a1c6e45b..e51e1e49 100644
--- a/ru/objective-c.md
+++ b/ru/objective-c.md
@@ -8,7 +8,6 @@ contributors:
 translators:
     - ["Evlogy Sutormin", "http://evlogii.com"]
     - ["Dmitry Bessonov", "https://github.com/TheDmitry"]
-lang: ru-ru
 ---
 
 Objective-C — основной язык программирования, используемый корпорацией Apple
diff --git a/ru/paren.md b/ru/paren.md
index 9b801e46..8a38f9d7 100644
--- a/ru/paren.md
+++ b/ru/paren.md
@@ -5,7 +5,6 @@ contributors:
   - ["KIM Taegyoon", "https://github.com/kimtg"]
 translators:
   - ["Dmitry Bessonov", "https://github.com/TheDmitry"]
-lang: ru-ru
 ---
 
 [Paren](https://bitbucket.org/ktg/paren) - это диалект языка Лисп. Он спроектирован как встроенный язык.
diff --git a/ru/pascal.md b/ru/pascal.md
index 544e3d8a..e35b2db2 100644
--- a/ru/pascal.md
+++ b/ru/pascal.md
@@ -6,7 +6,6 @@ contributors:
     - ["Keith Miyake", "https://github.com/kaymmm"]
 translators:
     - ["Anton 'Dart' Nikolaev", "https://github.com/dartfnm"]
-lang: ru-ru
 ---
 
 
diff --git a/ru/perl.md b/ru/perl.md
index dd44e57b..5844d194 100644
--- a/ru/perl.md
+++ b/ru/perl.md
@@ -6,7 +6,6 @@ contributors:
     - ["Korjavin Ivan", "http://github.com/korjavin"]
 translators:
     - ["Elena Bolshakova", "http://github.com/liruoko"]
-lang: ru-ru
 ---
 
 Perl -- высокоуровневый мощный язык с 25-летней историей.
diff --git a/ru/php-composer.md b/ru/php-composer.md
index 1a8b051e..6c23d640 100644
--- a/ru/php-composer.md
+++ b/ru/php-composer.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Aleksey Lysenko", "https://github.com/nasgul"]
 filename: LearnComposer-ru.sh
-lang: ru-ru
 ---
 
 [Composer](https://getcomposer.org/) — это инструмент управления зависимостями в PHP.
diff --git a/ru/php.md b/ru/php.md
index cfbfcc20..4e6ed628 100644
--- a/ru/php.md
+++ b/ru/php.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["SlaF", "https://github.com/SlaF"]
     - ["Corpsee", "https://github.com/corpsee"]
-lang: ru-ru
 filename: learnphp-ru.php
 ---
 
diff --git a/ru/pyqt.md b/ru/pyqt.md
index 708a5710..d491a3c2 100644
--- a/ru/pyqt.md
+++ b/ru/pyqt.md
@@ -1,7 +1,6 @@
 ---
 category: framework
 framework: PyQt
-lang: ru-ru
 filename: learnpyqt-ru.py
 contributors:
     - ["Nathan Hughes", "https://github.com/sirsharpest"]
diff --git a/ru/python.md b/ru/python.md
index b1aeec2a..9520422a 100644
--- a/ru/python.md
+++ b/ru/python.md
@@ -1,6 +1,5 @@
 ---
 language: Python
-lang: ru-ru
 contributors:
     - ["Louie Dinh", "http://ldinh.ca"]
     - ["Steven Basart", "http://github.com/xksteven"]
diff --git a/ru/pythonlegacy.md b/ru/pythonlegacy.md
index 6f1915fb..a13b5422 100644
--- a/ru/pythonlegacy.md
+++ b/ru/pythonlegacy.md
@@ -1,6 +1,5 @@
 ---
 language: Python 2 (legacy)
-lang: ru-ru
 contributors:
     - ["Louie Dinh", "http://ldinh.ca"]
 translators:
diff --git a/ru/qt.md b/ru/qt.md
index 3b6a2fd0..7e76b499 100644
--- a/ru/qt.md
+++ b/ru/qt.md
@@ -7,7 +7,6 @@ contributors:
     - ["Aleksey Kholovchuk", "https://github.com/vortexxx192"]
 translators:
     - ["Evan K.", "https://github.com/justblah"]
-lang: ru-ru
 ---
 
 **Qt** является широко известным фреймворком для разработки кросс-платформенного программного обеспечения, которое может быть запущено на различных программно-аппаратных платформах практически без изменений в коде, сохраняя при этом мощность и скорость нативных приложений. Хоть **Qt** и был изначально написан на *C++*, у него есть реализации и на других языках: *PyQt*, *QtRuby*, *PHP-Qt* и т.д.
diff --git a/ru/ruby.md b/ru/ruby.md
index 29f2bbf6..5830401e 100644
--- a/ru/ruby.md
+++ b/ru/ruby.md
@@ -1,6 +1,5 @@
 ---
 language: Ruby
-lang: ru-ru
 filename: learnruby-ru.rb
 contributors:
   - ["David Underwood", "http://theflyingdeveloper.com"]
diff --git a/ru/rust.md b/ru/rust.md
index 9893fefa..d9584b3b 100644
--- a/ru/rust.md
+++ b/ru/rust.md
@@ -7,7 +7,6 @@ contributors:
 translators:
     - ["Anatolii Kosorukov", "https://github.com/java1cprog"]
     - ["Vasily Starostin", "https://github.com/Basil22"]
-lang: ru-ru
 
 ---
 
diff --git a/ru/sql.md b/ru/sql.md
index 717f3a10..ae573907 100644
--- a/ru/sql.md
+++ b/ru/sql.md
@@ -6,7 +6,6 @@ contributors:
 translators:
   - ["Shaltaev", "https://github.com/shaltaev"]
   - ["Andre Polykanine", "https://github.com/Menelion"]
-lang: ru-ru
 ---
 
 Язык структурированных запросов (SQL) — это стандартный язык ISO для создания
diff --git a/ru/swift.md b/ru/swift.md
index 92577954..03c5aca0 100644
--- a/ru/swift.md
+++ b/ru/swift.md
@@ -9,7 +9,6 @@ filename: learnswift-ru.swift
 translators:
   - ["Dmitry Bessonov", "https://github.com/TheDmitry"]
   - ["Alexey Nazaroff", "https://github.com/rogaven"]
-lang: ru-ru
 ---
 
 Swift - это язык программирования, созданный компанией Apple, для приложений
diff --git a/ru/tcl.md b/ru/tcl.md
index aa1ece89..e0a11101 100644
--- a/ru/tcl.md
+++ b/ru/tcl.md
@@ -1,6 +1,5 @@
 ---
 language: Tcl
-lang: ru-ru
 contributors:
     - ["Poor Yorick", "https://pooryorick.com/"]
 translators:
diff --git a/ru/tmux.md b/ru/tmux.md
index 792d7560..3c2dd75f 100644
--- a/ru/tmux.md
+++ b/ru/tmux.md
@@ -6,7 +6,6 @@ contributors:
 translators:
   - ["Davydov Anton", "https://github.com/davydovanton"]
 filename: LearnTmux-ru.txt
-lang: ru-ru
 ---
 
 [tmux](http://tmux.sourceforge.net) - терминальный мультиплексор.
diff --git a/ru/typescript.md b/ru/typescript.md
index 385c6b81..2fe0ddc4 100644
--- a/ru/typescript.md
+++ b/ru/typescript.md
@@ -1,6 +1,5 @@
 ---
 language: TypeScript
-lang: ru-ru
 contributors:
     - ["Philippe Vlérick", "https://github.com/pvlerick"]
 translators:
diff --git a/ru/vim.md b/ru/vim.md
index b7f23e31..3d27396c 100644
--- a/ru/vim.md
+++ b/ru/vim.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Anton Slukovskiy", "https://github.com/slukovskiy"]
 filename: LearnVim-ru.txt
-lang: ru-ru
 ---
 
 [Vim](http://www.vim.org)
diff --git a/ru/visualbasic.md b/ru/visualbasic.md
index e9934822..149c4723 100644
--- a/ru/visualbasic.md
+++ b/ru/visualbasic.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["satory-ra", "https://github.com/satory-ra"]
 filename: learnvisualbasic-ru.vb
-lang: ru-ru
 ---
 
 ```vbnet
diff --git a/ru/xml.md b/ru/xml.md
index a04ec171..e756fe2f 100644
--- a/ru/xml.md
+++ b/ru/xml.md
@@ -5,7 +5,6 @@ contributors:
   - ["João Farias", "https://github.com/JoaoGFarias"]
 translators:
   - ["Dmitry Bessonov", "https://github.com/TheDmitry"]
-lang: ru-ru
 ---
 
 XML - это язык разметки, предназначенный для хранения и передачи данных.
diff --git a/ru/yaml.md b/ru/yaml.md
index 143a008b..5675f7f4 100644
--- a/ru/yaml.md
+++ b/ru/yaml.md
@@ -6,7 +6,6 @@ contributors:
 - [Suhas SG, 'https://github.com/jargnar']
 translators:
 - [Sergei Babin, 'https://github.com/serzn1']
-lang: ru-ru
 ---
 
 YAML как язык сериализации данных предназначен прежде всего для использования людьми.
diff --git a/ru/zfs.md b/ru/zfs.md
index 4232705f..62892f42 100644
--- a/ru/zfs.md
+++ b/ru/zfs.md
@@ -7,7 +7,6 @@ contributors:
 filename: LearnZfs-ru.txt
 translators:
     - ["A1EF", "https://github.com/A1EF"]
-lang: ru-ru
 ---
 
 
diff --git a/sk/bash.md b/sk/bash.md
index 05801ec0..89e6ea2f 100644
--- a/sk/bash.md
+++ b/sk/bash.md
@@ -12,7 +12,6 @@ contributors:
     - ["Etan Reisner", "https://github.com/deryni"]
 translators:
     - ["Juraj Kostolanský", "http://www.kostolansky.sk"]
-lang: sk-sk
 filename: LearnBash-sk.sh
 ---
 
diff --git a/sk/coffeescript.md b/sk/coffeescript.md
index 23f3cb27..20d37a45 100644
--- a/sk/coffeescript.md
+++ b/sk/coffeescript.md
@@ -5,7 +5,6 @@ contributors:
   - ["Xavier Yao", "http://github.com/xavieryao"]
 translators:
   - ["Juraj Kostolanský", "http://www.kostolansky.sk"]
-lang: sk-sk
 filename: coffeescript-sk.coffee
 ---
 
diff --git a/sk/elixir.md b/sk/elixir.md
index 62ab7067..90a24b46 100644
--- a/sk/elixir.md
+++ b/sk/elixir.md
@@ -6,7 +6,6 @@ contributors:
     - ["Ryan Plant", "https://github.com/ryanplant-au"]
 translators:
   - ["Peter Szatmary", "https://github.com/peterszatmary"]
-lang: sk-sk
 filename: learnelixir-sk.ex
 ---
 
diff --git a/sk/git.md b/sk/git.md
index e6d6b0d7..d5b1a53a 100644
--- a/sk/git.md
+++ b/sk/git.md
@@ -9,7 +9,6 @@ contributors:
     - ["Andrew Taylor", "http://github.com/andrewjt71"]
 translators:
     - ["Terka Slanináková", "http://github.com/TerkaSlan"]
-lang: sk-sk
 filename: LearnGit-sk.txt
 ---
 
diff --git a/sk/json.md b/sk/json.md
index 26966996..d2d1a46e 100644
--- a/sk/json.md
+++ b/sk/json.md
@@ -6,7 +6,6 @@ contributors:
   - ["Marco Scannadinari", "https://github.com/marcoms"]
 translators:
   - ["Juraj Kostolanský", "http://www.kostolansky.sk"]
-lang: sk-sk
 ---
 
 Nakoľko je JSON extrémne jednoduchý formát na výmenu dát, toto bude
diff --git a/sk/latex.md b/sk/latex.md
index 4366f0f5..def2d4d1 100644
--- a/sk/latex.md
+++ b/sk/latex.md
@@ -6,7 +6,6 @@ contributors:
     - ["Sricharan Chiruvolu", "http://sricharan.xyz"]
 translators:
     - ["Terka Slanináková", "http://github.com/TerkaSlan"]
-lang: sk-sk
 filename: learn-latex-sk.tex
 ---
 
diff --git a/sk/ruby.md b/sk/ruby.md
index 7d81cd1d..76fae690 100644
--- a/sk/ruby.md
+++ b/sk/ruby.md
@@ -14,7 +14,6 @@ contributors:
   - ["Rahil Momin", "https://github.com/iamrahil"]
 translators:
   - ["Juraj Kostolanský", "http://www.kostolansky.sk"]
-lang: sk-sk
 ---
 
 ```ruby
diff --git a/sl/asciidoc.md b/sl/asciidoc.md
index 6c8dcec9..894af199 100644
--- a/sl/asciidoc.md
+++ b/sl/asciidoc.md
@@ -5,7 +5,6 @@ contributors:
     - ["Abel Salgado Romero", "https://twitter.com/abelsromero"]
 translators:
     - ["Filip Štamcar", "https://github.com/filips123"]
-lang: sl-si
 filename: asciidoc-sl.adoc
 ---
 
diff --git a/sv/bf.md b/sv/bf.md
index 57cd22c4..525038be 100644
--- a/sv/bf.md
+++ b/sv/bf.md
@@ -6,7 +6,6 @@ contributors:
     - ["Mathias Bynens", "http://mathiasbynens.be/"]
 translators:
     - ["Richard Lindberg", "https://github.com/Lidenburg"]
-lang: sv-se
 ---
 
 Brainfuck (ej versaliserat förutom vid ny mening) är ett extremt
diff --git a/sv/haskell.md b/sv/haskell.md
index 30ab2c72..6c461801 100644
--- a/sv/haskell.md
+++ b/sv/haskell.md
@@ -5,7 +5,6 @@ contributors:
     - ["Adit Bhargava", "http://adit.io"]
 translators:
     - ["Edward Tjörnhammar", "http://edwtjo.me"]
-lang: sv-se
 ---
 
 Haskell skapades för att vara ett praktiskt, rent, funktionellt
diff --git a/sv/json.md b/sv/json.md
index 24c1d1c3..40a423e6 100644
--- a/sv/json.md
+++ b/sv/json.md
@@ -9,7 +9,6 @@ contributors:
 translators:
   - ["Lari Kovanen", "https://github.com/larkov"]
   - ["Joakim Lahtinen", "https://github.com/VibyJocke"]
-lang: sv-se
 ---
 
 JSON är ett extremt enkelt datautbytesformat. Som [json.org](http://json.org) beskriver så är det lätt för människor att läsa och skriva, och för datorer att tolka och generera.
diff --git a/sv/nix.md b/sv/nix.md
index 02867e06..6a810403 100644
--- a/sv/nix.md
+++ b/sv/nix.md
@@ -5,7 +5,6 @@ contributors:
     - ["Chris Martin", "http://chris-martin.org/"]
 translators:
     - ["Edward Tjörnhammar", "http://edwtjo.me"]
-lang: sv-se
 ---
 
 Nix är ett enkelt funktionelt språk utvecklat för
diff --git a/ta/css.md b/ta/css.md
index ca489314..87d14cb4 100644
--- a/ta/css.md
+++ b/ta/css.md
@@ -9,7 +9,6 @@ contributors:
 translators:
     - ["Rasendran Kirushan", "https://github.com/kirushanr"]
 filename: learncss-ta.css
-lang: ta-in
 ---
 
 
diff --git a/ta/javascript.md b/ta/javascript.md
index 723f1a50..737c6967 100644
--- a/ta/javascript.md
+++ b/ta/javascript.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Rasendran Kirushan", "https://github.com/kirushanr"]
 filename: javascript-ta.js
-lang: ta-in
 ---
 
 JavaScript 1995 ஆம்  ஆண்டு Netscape இல் பணிபுரிந்த Brendan Eich
diff --git a/ta/json.md b/ta/json.md
index 0f7e6898..fbd40330 100644
--- a/ta/json.md
+++ b/ta/json.md
@@ -7,7 +7,6 @@ contributors:
   - ["himanshu", "https://github.com/himanshu81494"]
 translators:
   - ["Rasendran Kirushan", "https://github.com/kirushanr"]
-lang: ta-in
 ---
 
 ஜேசன் ஒரு ஒரு மிக எளிய தரவு உள்மாற்றீட்டு வடிவம் ஆகும்.
diff --git a/ta/xml.md b/ta/xml.md
index 94b4492d..9bf2ff4b 100644
--- a/ta/xml.md
+++ b/ta/xml.md
@@ -6,7 +6,6 @@ contributors:
 translators:
   - ["Rasendran Kirushan", "https://github.com/kirushanr"]
   - ["Sridhar Easwaran", "https://github.com/sridhareaswaran"]
-lang: ta-in
 ---
 
 
diff --git a/th/pascal.md b/th/pascal.md
index 5c2284b6..bb179d8a 100644
--- a/th/pascal.md
+++ b/th/pascal.md
@@ -6,7 +6,6 @@ contributors:
     - ["Keith Miyake", "https://github.com/kaymmm"]
 translators:
     - ["Worajedt Sitthidumrong", "https://bitbucket.org/wrj"]
-lang: th-th
 ---
 
 > Pascal (ปาสกาล) เป็นภาษาโปรแกรมมิ่งทั้งแบบ imperative และ procedural ที่ออกแบบโดย Niklaus Wirth (นิเคล้า เวิร์ท) เมื่อปี 1968-69 และเผยแพร่ตอน 1970 โดยเน้นให้เป็นภาษาที่เล็ก มีประสิทธิภาพ เพื่อเสริมการเขียนโปรแกรมที่มีแนวปฏิบัติที่ดีด้วยการใช้โครงสร้างของตัวภาษา และโครงสร้างข้อมูลมากำกับ ชื่อของภาษานี้ตั้งเป็นเกียรติให้กับนักคณิตศาสตร์ชาวฝรั่งเศส, นักปรัชญา และนักฟิสิกส์ ชื่อ Blaise Pascal (เบลส ปาสกาล) ข้อมูลจาก : [วิกิพีเดีย][1]
diff --git a/th/typescript.md b/th/typescript.md
index 955f01c0..226c918a 100644
--- a/th/typescript.md
+++ b/th/typescript.md
@@ -4,7 +4,6 @@ contributors:
     - ["Philippe Vlérick", "https://github.com/pvlerick"]
     - ["Worajedt Sitthidumrong", "https://bitbucket.org/wrj"]
 filename: learntypescript-th.ts
-lang: th-th
 ---
 
 TypeScript เป็นภาษาที่มีเป้าหมายเพื่อทำให้การพัฒนาซอฟต์แวร์ขนาดใหญ่ด้วย JavaScript ทำได้ง่ายขึ้น โดยที่ TypeScript ได้เพิ่มแนวคิดที่พบทั่วไป อาทิ classes, modules, interfaces, generics และ static typing (ไม่บังคับ) เข้าไปในภาษา JavaScript ดังนั้น TypeScript ก็เลยเป็น Super Set ของ JavaScript อีกที โค้ด JavaScript ทุกส่วน ก็คือโค้ดที่ทำงานได้ถูกต้องใน TypeScript ทำให้เราเพิ่ม TypeScript เข้าไปใช้ในโปรเจคการพัฒนาของเราได้ไม่ยากเลย เพราะ TypeScript คอมไพล์ผลลัพธ์ออกมาเป็น JavaScript ในท้ายสุดอยู่ดี
diff --git a/tr/bf.md b/tr/bf.md
index 3de4bd6b..3692759f 100644
--- a/tr/bf.md
+++ b/tr/bf.md
@@ -5,7 +5,6 @@ contributors:
     - ["Prajit Ramachandran", "http://prajitr.github.io"]
 translators:
     - ["Haydar KULEKCI", "http://scanf.info/"]
-lang: tr-tr
 ---
 
 Brainfuck (normalde brainfuck olarak bütün harfleri küçük olarak yazılır.) 
diff --git a/tr/c++.md b/tr/c++.md
index 544c008e..28ac454d 100644
--- a/tr/c++.md
+++ b/tr/c++.md
@@ -1,6 +1,5 @@
 ---
 language: C++
-lang: tr-tr
 filename: learncpp-tr.cpp
 contributors:
     - ["Steven Basart", "http://github.com/xksteven"]
diff --git a/tr/c.md b/tr/c.md
index 7607500d..d8effb64 100644
--- a/tr/c.md
+++ b/tr/c.md
@@ -6,7 +6,6 @@ contributors:
     - ["Adam Bard", "http://adambard.com/"]
 translators:
     - ["Haydar KULEKCI", "http://scanf.info/"]
-lang: tr-tr
 ---
 
 C halen modern yüksek performans bilgisayarların dili.
diff --git a/tr/clojure.md b/tr/clojure.md
index 51ca6ae1..017efa90 100644
--- a/tr/clojure.md
+++ b/tr/clojure.md
@@ -1,6 +1,5 @@
 ---
 language: Clojure
-lang: tr-tr
 filename: learnclojure-tr.clj
 contributors:
     - ["Adam Bard", "http://adambard.com/"]
diff --git a/tr/csharp.md b/tr/csharp.md
index e9dae611..a9340fbc 100644
--- a/tr/csharp.md
+++ b/tr/csharp.md
@@ -7,7 +7,6 @@ contributors:
     - ["Shaun McCarthy", "http://www.shaunmccarthy.com"]
 translators:
     - ["Melih Mucuk", "http://melihmucuk.com"]
-lang: tr-tr
 filename: LearnCSharp-tr.cs
 ---
 
diff --git a/tr/css.md b/tr/css.md
index f08c0af9..0cb68048 100644
--- a/tr/css.md
+++ b/tr/css.md
@@ -11,7 +11,6 @@ contributors:
 filename: learncss-tr.css
 translators:
     - ["Fatih Turan", "http://fatihturan.com"]
-lang: tr-tr
 ---
 
 Web sayfaları bir sayfanın içeriğini belirleyen HTML ile inşa edilirler. CSS (Basamaklı Biçim Sayfaları) ise bir sayfanın **görünümünü** belirleyen ayrı bir dildir.
diff --git a/tr/dynamic-programming.md b/tr/dynamic-programming.md
index 1d47531a..567ef46a 100644
--- a/tr/dynamic-programming.md
+++ b/tr/dynamic-programming.md
@@ -4,7 +4,6 @@ contributors:
     - ["Akashdeep Goel", "https://github.com/akashdeepgoel"]
 translators:
     - ["Mehmet Cem Yaraş", "https://www.linkedin.com/in/yarascem/"]
-lang: tr-tr
 ---
 
 # Dinamik Programlama
diff --git a/tr/edn.md b/tr/edn.md
index 638dd6b9..be50198f 100644
--- a/tr/edn.md
+++ b/tr/edn.md
@@ -1,7 +1,6 @@
 ---
 language: EDN
 filename: learnedn-tr.edn
-lang: tr-tr
 contributors:
   - ["Seçkin KÜKRER", "https://github.com/LeaveNhA"]
 ---
diff --git a/tr/fsharp.md b/tr/fsharp.md
index f7126c48..712f73ca 100644
--- a/tr/fsharp.md
+++ b/tr/fsharp.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Mustafa Zengin", "http://zengin.github.io/"]
 filename: learnfsharp-tr.fs
-lang: tr-tr
 ---
 
 F# fonksiyonel ve nesne yönelimli, genel amaçlı bir programlama dilidir. Bedava ve açık kaynaklıdır ve Linux, Mac, Windows ve dahasında çalışır.
diff --git a/tr/gdscript.md b/tr/gdscript.md
index 91be0327..dd360725 100644
--- a/tr/gdscript.md
+++ b/tr/gdscript.md
@@ -6,7 +6,6 @@ contributors:
 filename: learngdscript.gd
 translators:
     - ["R1cHero", "https://github.com/R1cHero"]
-lang: tr-tr
 ---
 
 GDScript, özgür ve açık kaynaklı oyun motoru olan Godot için dinamik ve statik olarak 
diff --git a/tr/git.md b/tr/git.md
index 126de213..9692c561 100644
--- a/tr/git.md
+++ b/tr/git.md
@@ -1,6 +1,5 @@
 ---
 category: tool
-lang: tr-tr
 tool: Git
 contributors:
     - ["Jake Prather", "http://github.com/JakeHP"]
diff --git a/tr/html.md b/tr/html.md
index d68b4b04..1acf48ff 100644
--- a/tr/html.md
+++ b/tr/html.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Kemal MUTLU", "https://github.com/kemtake"]
     - ["Nuri Akman", "https://github.com/vedia"]
-lang: tr-tr
 ---
 
 HTML, HyperText Markup Language (Hiper Metin İşaretleme Dili) anlamına gelir.
diff --git a/tr/javascript.md b/tr/javascript.md
index 7079121d..7b023f8d 100644
--- a/tr/javascript.md
+++ b/tr/javascript.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Kaan Kaçar", "https://github.com/kaankacar"]
 filename: learnjavascript-tr.js
-lang: tr-tr
 ---
 
 JavaScript, Brendan Eich tarafından 1995 yılında oluşturuldu. Başlangıçta, daha karmaşık web uygulamaları için Java'nın kullanıldığı siteler için daha basit bir betik dili olarak tasarlandı, ancak Web sayfalarıyla sıkı entegrasyonu ve tarayıcılardaki yerleşik desteği nedeniyle Java'dan daha yaygın hale geldi.
diff --git a/tr/jquery.md b/tr/jquery.md
index 0951f29e..4a85948c 100644
--- a/tr/jquery.md
+++ b/tr/jquery.md
@@ -4,7 +4,6 @@ framework: jQuery
 contributors:
     - ["Seçkin KÜKRER", "https://github.com/leavenha"]
 filename: jquery-tr.js
-lang: tr-tr
 ---
 
 # Tanım
diff --git a/tr/kotlin.md b/tr/kotlin.md
index efb3d4a9..8eed110f 100644
--- a/tr/kotlin.md
+++ b/tr/kotlin.md
@@ -3,7 +3,6 @@ language: Kotlin
 filename: kotlin-tr.kt
 contributors:
         - ["Baha Can Aydın", "https://github.com/bahacan19"]
-lang: tr-tr
 ---
 Kotlin, JVM, Android ve tarayıcı için statik olarak yazılmış bir programlama dilidir.
 Java %100 birlikte çalışabilir.
diff --git a/tr/markdown.md b/tr/markdown.md
index eb22b37c..8bd51e99 100644
--- a/tr/markdown.md
+++ b/tr/markdown.md
@@ -4,7 +4,6 @@ contributors:
     - ["Dan Turkel", "http://danturkel.com/"]
 translators:
     - ["Eray AYDIN", "http://erayaydin.me/"]
-lang: tr-tr
 filename: markdown-tr.md
 ---
 
diff --git a/tr/objective-c.md b/tr/objective-c.md
index 3ea502cf..6c885799 100644
--- a/tr/objective-c.md
+++ b/tr/objective-c.md
@@ -6,7 +6,6 @@ contributors:
 filename: LearnObjectiveC-tr.m
 translators:
     - ["Haydar KULEKCI", "http://scanf.info/"]
-lang: tr-tr
 ---
 
 Objective-C Apple tarafından, OSX ve iOS işletim sistemleri ve onların
diff --git a/tr/php.md b/tr/php.md
index fd9ab086..f6992556 100644
--- a/tr/php.md
+++ b/tr/php.md
@@ -6,7 +6,6 @@ contributors:
     - ["Trismegiste", "https://github.com/Trismegiste"]
 translators:
     - ["Haydar KULEKCI", "http://scanf.info/"]
-lang: tr-tr
 ---
 
 PHP 5+ versiyonu için geçerlidir.
diff --git a/tr/python.md b/tr/python.md
index bef337b0..db3bc213 100644
--- a/tr/python.md
+++ b/tr/python.md
@@ -7,7 +7,6 @@ contributors:
     - ["Batuhan Osman T.", "https://github.com/BTaskaya"]
 translators:
     - ["Eray AYDIN", "http://erayaydin.me/"]
-lang: tr-tr
 filename: learnpython-tr.py
 ---
 
diff --git a/tr/pythonlegacy.md b/tr/pythonlegacy.md
index 3c195965..27f546ee 100644
--- a/tr/pythonlegacy.md
+++ b/tr/pythonlegacy.md
@@ -5,7 +5,6 @@ contributors:
     - ["Louie Dinh", "http://ldinh.ca"]
 translators:
     - ["Haydar KULEKCI", "http://scanf.info/"]
-lang: tr-tr
 ---
 Python Guido Van Rossum tarafından 90'ların başında yaratılmıştır. Şu anda 
 varolanlar arasında en iyi dillerden birisidir. Ben (Louie Dinh) Python
diff --git a/tr/ruby.md b/tr/ruby.md
index c0a8ffcc..4e78fbf8 100644
--- a/tr/ruby.md
+++ b/tr/ruby.md
@@ -3,7 +3,6 @@ language: Ruby
 filename: learnruby-tr.rb
 contributors:
   - ["Seçkin KÜKRER", "https://github.com/LeaveNhA"]
-lang: tr-tr
 ---
 
 Ruby, doğrudan bir Google aramasıyla aklınızdakini bulmanız zor olabilir. İngilizce bu kelime, `Ruby` (IPA: ˈruːbi) "kırmızı taş" anlamına gelen Fransızca kökenli bir kelime olan `rubi`'den gelmektedir.
diff --git a/tr/sql.md b/tr/sql.md
index 8c5b342c..089c52d0 100644
--- a/tr/sql.md
+++ b/tr/sql.md
@@ -2,7 +2,6 @@
 language: SQL
 contributors:
   - ["Metin Yalçınkaya", "https://github.com/mtnylnky"]
-lang: tr-tr
 filename: learnsql-tr.sql
 ---
 
diff --git a/tr/swift.md b/tr/swift.md
index fae7bde2..89f66c61 100644
--- a/tr/swift.md
+++ b/tr/swift.md
@@ -3,7 +3,6 @@ language: Swift
 contributors:
   - ["Özgür Şahin", "https://github.com/ozgurshn/"]
 filename: learnswift-tr.swift
-lang: tr-tr
 ---
 
 Swift iOS ve OSX platformlarında geliştirme yapmak için Apple tarafından oluşturulan yeni bir programlama dilidir.  Objective - C ile beraber kullanılabilecek ve de hatalı kodlara karşı daha esnek bir yapı sunacak bir şekilde tasarlanmıştır. Swift 2014 yılında Apple'ın geliştirici konferansı WWDC de tanıtıldı. Xcode 6+'a dahil edilen LLVM derleyici ile geliştirildi.
diff --git a/tr/typescript.md b/tr/typescript.md
index a84dddc8..0941174d 100644
--- a/tr/typescript.md
+++ b/tr/typescript.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Mustafa Zengin", "http://zengin.github.io"]
 filename: learntypescript-tr.ts
-lang: tr-tr
 ---
 
 TypeScript, JavaScript'le yazılmış büyük ölçekli uygulamaların geliştirilmesini kolaylaştırmayı hedefleyen bir dildir.
diff --git a/uk/awk.md b/uk/awk.md
index 6360ee37..b42a6a46 100644
--- a/uk/awk.md
+++ b/uk/awk.md
@@ -6,7 +6,6 @@ contributors:
      - ["Marshall Mason", "http://github.com/marshallmason"]
 translators:
      - ["Ihor Sokorchuk", "https://github.com/IhorSokorchuk"]
-lang: uk-ua
 ---
 
 AWK є стандартним інструментом у кожній POSIX-сумісній системі UNIX.
diff --git a/uk/bash.md b/uk/bash.md
index d412ecab..a0cd463b 100644
--- a/uk/bash.md
+++ b/uk/bash.md
@@ -13,7 +13,6 @@ contributors:
 translators:
     - ["Ehreshi Ivan", "https://github.com/IvanEh"]
     - ["Serhii Maksymchuk", "https://github.com/Serg-Maximchuk"]
-lang: uk-ua
 ---
 
 Bash - командна оболонка unix (unix shell), що також розповсюджувалась як оболонка для
diff --git a/uk/c.md b/uk/c.md
index 24bbcb68..250015b0 100644
--- a/uk/c.md
+++ b/uk/c.md
@@ -12,7 +12,6 @@ contributors:
     - ["Dragos B. Chirila", "https://github.com/dchirila"]
 translators:
     - ["AstiaSun", "https://github.com/AstiaSun"]
-lang: uk-ua
 ---
 
 О, C! Досі мова для сучасних обчислень у високопродуктивних продуктах.
diff --git a/uk/cypher.md b/uk/cypher.md
index 66edc707..dbd9a588 100644
--- a/uk/cypher.md
+++ b/uk/cypher.md
@@ -5,7 +5,6 @@ contributors:
     - ["Théo Gauchoux", "https://github.com/TheoGauchoux"]
 translators:
     - ["AstiaSun", "https://github.com/AstiaSun"]
-lang: uk-ua
 ---
 
 Cypher - це мова запитів Neo4j для спрощення роботи з графами. Вона повторює синтаксис SQL та перемішує його з таким собі ascii стилем для відображення структури графа.
diff --git a/uk/go.md b/uk/go.md
index 0bbe36e8..e2cc4654 100644
--- a/uk/go.md
+++ b/uk/go.md
@@ -13,7 +13,6 @@ contributors:
     - ["Leonid Shevtsov", "https://github.com/leonid-shevtsov"]
 translators:
     - ["AstiaSun", "https://github.com/AstiaSun"]
-lang: uk-ua
 ---
 
 Go був створений для того, щоб виконати задачу. Це не останній тренд в теорії мов програмування, а спосіб вирішення реальних проблем.
diff --git a/uk/java.md b/uk/java.md
index 6cce4c19..09c1bc73 100644
--- a/uk/java.md
+++ b/uk/java.md
@@ -12,7 +12,6 @@ contributors:
 translators:
     - ["Oleksandr Tatarchuk", "https://github.com/tatarchuk"]
     - ["Andre Polykanine", "https://github.com/Oire"]
-lang: uk-ua
 
 ---
 
diff --git a/uk/javascript.md b/uk/javascript.md
index a6e84ad2..058bd4a5 100644
--- a/uk/javascript.md
+++ b/uk/javascript.md
@@ -8,7 +8,6 @@ filename: javascript-uk.js
 translators:
   - ["Ivan", "https://github.com/IvanEh"]
   - ["Serhii Maksymchuk", "https://github.com/Serg-Maximchuk"]
-lang: uk-ua
 ---
 
 JavaScript було створено в 1995 році Бренданом Айком, який працював у компанії Netscape.
diff --git a/uk/json.md b/uk/json.md
index 4697b522..3df1a6d8 100644
--- a/uk/json.md
+++ b/uk/json.md
@@ -7,7 +7,6 @@ contributors:
 translators:
   - ["Ehreshi Ivan", "https://github.com/IvanEh"]
   - ["Serhii Maksymchuk", "https://github.com/Serg-Maximchuk"]
-lang: uk-ua
 ---
 
 JSON - це надзвичайно простий формат обміну даними. Згідно з [json.org](http://json.org), для людей він легкий в написанні і читанні, а для комп’ютерів в розборі та генерації.
diff --git a/uk/kotlin.md b/uk/kotlin.md
index b6863de5..02218dd6 100644
--- a/uk/kotlin.md
+++ b/uk/kotlin.md
@@ -1,7 +1,6 @@
 ---
 language: Kotlin
 filename: LearnKotlin-uk.kt
-lang: uk-ua
 contributors:
     - ["S Webber", "https://github.com/s-webber"]
 translators:
diff --git a/uk/mips.md b/uk/mips.md
index 2f27a49d..4d877a51 100644
--- a/uk/mips.md
+++ b/uk/mips.md
@@ -5,7 +5,6 @@ contributors:
   - ["Stanley Lim", "https://github.com/Spiderpig86"]
 translators:
   - ["AstiaSun", "https://github.com/AstiaSun"]
-lang: uk-ua
 ---
 
 Мова ассемблера MIPS (англ. Microprocessor without Interlocked Pipeline Stages) була написана для роботи з мікропроцесорами MIPS, парадигма яких була описана в 1981 році [Джоном Геннессі](https://uk.wikipedia.org/wiki/Джон_Лерой_Геннессі). Ці RISC процесори використовуються у таких вбудованих системах, як маршрутизатори та мережеві шлюзи.
diff --git a/uk/pythonlegacy.md b/uk/pythonlegacy.md
index 6ecd38fb..df348efc 100644
--- a/uk/pythonlegacy.md
+++ b/uk/pythonlegacy.md
@@ -1,6 +1,5 @@
 ---
 language: Python 2 (legacy)
-lang: uk-ua
 contributors:
     - ["Louie Dinh", "http://ldinh.ca"]
     - ["Amin Bandali", "https://aminb.org"]
diff --git a/uk/ruby.md b/uk/ruby.md
index b39c1189..93d8df7e 100644
--- a/uk/ruby.md
+++ b/uk/ruby.md
@@ -17,7 +17,6 @@ contributors:
   - ["Jake Faris", "https://github.com/farisj"]
 translators:
   - ["Serhii Maksymchuk", "https://github.com/Serg-Maximchuk"]
-lang: uk-ua
 ---
 
 Rubi — це інтерпретована, повністю об'єктно-орієнтована мова програмування з чіткою динамічною типізацією.
diff --git a/uk/rust.md b/uk/rust.md
index a6320f92..a3e18655 100644
--- a/uk/rust.md
+++ b/uk/rust.md
@@ -5,7 +5,6 @@ contributors:
 translators:
   - ["Volodymyr Korniichuk", "https://github.com/ezhikus"]
 filename: learnrust-uk.rs
-lang: uk-ua
 ---
 
 Rust - це мова програмування, що розрабляється спільнотою Mozilla Research
diff --git a/uk/wasm.md b/uk/wasm.md
index 985cc28a..5ac4b5eb 100644
--- a/uk/wasm.md
+++ b/uk/wasm.md
@@ -1,6 +1,5 @@
 ---
 language: WebAssembly
-lang: uk-ua
 filename: learnwasm-ua.wast
 contributors:
     - ["Dean Shaff", "http://dean-shaff.github.io"]
diff --git a/vi/git.md b/vi/git.md
index fca5617a..03660a58 100644
--- a/vi/git.md
+++ b/vi/git.md
@@ -5,7 +5,6 @@ contributors:
     - ["Jake Prather", "http://github.com/JakeHP"]
     - ["Vinh Nguyen", "https://twitter.com/vinhnx"]
 filename: LearnGit-vi.txt
-lang: vi-vn
 ---
 
 Git là một hệ quản lý mã nguồn và phiên bản phân tán (distributed version control and source code management system).
diff --git a/vi/html.md b/vi/html.md
index 29cf7ec6..297fe825 100644
--- a/vi/html.md
+++ b/vi/html.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Robert Steed", "https://github.com/robochat"]
     - ["Xuan (Sean) Luong", "https://github.com/xuanluong"]
-lang: vi-vn
 ---
 
 HTML là viết tắt của HyperText Markup Language (Ngôn ngữ đánh dấu siêu văn bản).
diff --git a/vi/json.md b/vi/json.md
index 5d694124..0d875be6 100644
--- a/vi/json.md
+++ b/vi/json.md
@@ -7,7 +7,6 @@ contributors:
   - ["himanshu", "https://github.com/himanshu81494"]
 translators:
   - ["Thanh Phan", "https://github.com/thanhpd"]
-lang: vi-vn
 ---
 
 Do JSON là một ngôn ngữ trao đổi dữ liệu hết sức đơn giản, đây có thể sẽ là bài
diff --git a/vi/less.md b/vi/less.md
index 37634cda..d7fd7f70 100644
--- a/vi/less.md
+++ b/vi/less.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Thanh Duy Phan", "https://github.com/thanhpd"]
 filename: learnless-vi.less
-lang: vi-vn
 ---
 
 Less là một CSS pre-processor (bộ tiền xử lí CSS), nó thêm các tính năng như biến (variable), lồng (nesting), mixin và nhiều thứ khác. Less cùng với các CSS pre-processor khác như [Sass](http://sass-lang.com/) giúp lập trình viên viết được các đoạn CSS bảo trì được và không bị lặp lại (DRY - Don't Repeat Yourself).
diff --git a/vi/markdown.md b/vi/markdown.md
index 95d6b72d..e1996888 100644
--- a/vi/markdown.md
+++ b/vi/markdown.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Thanh Duy Phan", "https://github.com/thanhpd"]
 filename: markdown-vi.md
-lang: vi-vn
 ---
 
 Ngôn ngữ Markdown được sáng lập bởi John Gruber vào năm 2004. Nó được tạo ra với mục đích dễ đọc với cú pháp có thể được dễ dàng chuyển đổi qua HTML và các ngôn ngữ khác
diff --git a/vi/objective-c.md b/vi/objective-c.md
index f300d52f..a0341999 100644
--- a/vi/objective-c.md
+++ b/vi/objective-c.md
@@ -3,7 +3,6 @@ language: Objective-C
 contributors:
     - ["Eugene Yagrushkin", "www.about.me/yagrushkin"]
     - ["Yannick Loriot", "https://github.com/YannickL"]
-lang: vi-vn
 filename: LearnObjectiveC-vi.m
 ---
 
diff --git a/vi/python.md b/vi/python.md
index 3e496c81..4cf2fd06 100644
--- a/vi/python.md
+++ b/vi/python.md
@@ -9,7 +9,6 @@ contributors:
     - ["evuez", "http://github.com/evuez"]
 translators:
     - ["Xuan (Sean) Luong, https://github.com/xuanluong"]
-lang: vi-vn
 
 ---
 
diff --git a/vi/ruby-ecosystem.md b/vi/ruby-ecosystem.md
index f747bf2f..83a49dd6 100644
--- a/vi/ruby-ecosystem.md
+++ b/vi/ruby-ecosystem.md
@@ -5,7 +5,6 @@ contributors:
     - ["Jon Smock", "http://github.com/jonsmock"]
     - ["Rafal Chmiel", "http://github.com/rafalchmiel"]
     - ["Vinh Nguyen", "http://rubydaily.net"]
-lang: vi-vn
 ---
 
 Nhìn chung các lập trình viên Ruby luôn có cách để cài đặt các phiên bản
diff --git a/vi/ruby.md b/vi/ruby.md
index a3f8088c..807442db 100644
--- a/vi/ruby.md
+++ b/vi/ruby.md
@@ -13,7 +13,6 @@ contributors:
   - ["Levi Bostian", "https://github.com/levibostian"]
   - ["Rahil Momin", "https://github.com/iamrahil"]
   - ["Vinh Nguyen", "http://rubydaily.net"]
-lang: vi-vn
 
 ---
 
diff --git a/vi/sass.md b/vi/sass.md
index 49108a5d..a6a13b3a 100644
--- a/vi/sass.md
+++ b/vi/sass.md
@@ -8,7 +8,6 @@ contributors:
   - ["Keith Miyake", "https://github.com/kaymmm"]
 translators:
     - ["Thanh Duy Phan", "https://github.com/thanhpd"]
-lang: vi-vn
 ---
 
 Less là một ngôn ngữ mở rộng CSS/ CSS pre-processor, thêm các tính năng như biến (variable), lồng (nesting), mixin và nhiều thứ khác. Sass cùng với các CSS pre-processor khác như [Less](http://lesscss.org/) giúp lập trình viên viết được các đoạn CSS bảo trì được và không bị lặp lại (DRY - Don't Repeat Yourself).
diff --git a/vi/typescript.md b/vi/typescript.md
index c8cbd2bb..37d14784 100644
--- a/vi/typescript.md
+++ b/vi/typescript.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Thanh Duy Phan", "https://github.com/thanhpd"]
 filename: learntypescript-vi.ts
-lang: vi-vn
 ---
 
 TypeScript là ngôn ngữ được viết nhằm tinh giản quá trình phát triển ứng dụng quy mô lớn được viết bằng JavaScript.
diff --git a/vi/xml.md b/vi/xml.md
index 5b521a0a..c6b8e42f 100644
--- a/vi/xml.md
+++ b/vi/xml.md
@@ -7,7 +7,6 @@ contributors:
   - ['Deepanshu Utkarsh', 'https://github.com/duci9y']
 translators:
   - ['Thanh Duy Phan', 'https://github.com/thanhpd']
-lang: vi-vn
 ---
 
 XML là ngôn ngữ đánh dấu được thiết kế để lưu trữ và truyền tải dữ liệu. Nó có thể được đọc hiểu bởi cả người và máy.
diff --git a/zh-cn/angularjs.md b/zh-cn/angularjs.md
index 3cc3f1e5..d42913f5 100644
--- a/zh-cn/angularjs.md
+++ b/zh-cn/angularjs.md
@@ -6,7 +6,6 @@ contributors:
 filename: learnangular-cn.txt
 translators:
    - ["Jiang Haiyun", "http://www.atjiang.com"]
-lang: zh-cn
 ---
 
 ## AngularJS 教程。
diff --git a/zh-cn/asciidoc.md b/zh-cn/asciidoc.md
index 0e45dcc0..a60f2a23 100644
--- a/zh-cn/asciidoc.md
+++ b/zh-cn/asciidoc.md
@@ -6,7 +6,6 @@ contributors:
     - ["Abel Salgado Romero", "https://twitter.com/abelsromero"]
 translators:
     - ["Liu Yihua", "https://github.com/yihuajack"]
-lang: zh-cn
 ---
 
 AsciiDoc 是一种类似于 Markdown 的标记语言，它可以用来写从书到博客的任何东西。它由 Stuart Rackham 在 2002 年发明，它的语言很简单，但同时也可以有丰富的定制。
diff --git a/zh-cn/awk.md b/zh-cn/awk.md
index cb2f26db..2cd59848 100644
--- a/zh-cn/awk.md
+++ b/zh-cn/awk.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Tian Zhipeng", "https://github.com/tianzhipeng-git"]
 filename: learnawk-cn.awk
-lang: zh-cn
 ---
 
 AWK是POSIX兼容的UNIX系统中的标准工具. 它像简化版的Perl, 非常适用于文本处理任务和其他脚本类需求.
diff --git a/zh-cn/bash.md b/zh-cn/bash.md
index 1585842b..508d437f 100644
--- a/zh-cn/bash.md
+++ b/zh-cn/bash.md
@@ -14,7 +14,6 @@ translators:
     - ["Jinchang Ye", "https://github.com/Alwayswithme"]
     - ["Chunyang Xu", "https://github.com/XuChunyang"]
 filename: LearnBash-cn.sh
-lang: zh-cn
 ---
 
 Bash 是一个为 GNU 计划编写的 Unix shell，是 Linux 和 macOS 下的默认 shell。
diff --git a/zh-cn/bc.md b/zh-cn/bc.md
index e2cc3680..e1ff0abd 100644
--- a/zh-cn/bc.md
+++ b/zh-cn/bc.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["CloneWith", "https://github.com/CloneWith"]
 filename: learnbc.bc
-lang: zh-cn
 ---
 ```bc
 /*这是一条
diff --git a/zh-cn/bf.md b/zh-cn/bf.md
index f0c0eec8..6b98a6dd 100644
--- a/zh-cn/bf.md
+++ b/zh-cn/bf.md
@@ -6,7 +6,6 @@ contributors:
     - ["Mathias Bynens", "http://mathiasbynens.be/"]
 translators:
     - ["lyuehh", "https://github.com/lyuehh"]
-lang: zh-cn
 
 ---
 
diff --git a/zh-cn/c++.md b/zh-cn/c++.md
index aec060ed..00c8b7c1 100644
--- a/zh-cn/c++.md
+++ b/zh-cn/c++.md
@@ -6,7 +6,6 @@ contributors:
     - ["Matt Kline", "https://github.com/mrkline"]
 translators:
     - ["Arnie97", "https://github.com/Arnie97"]
-lang: zh-cn
 ---
 
 C++是一种系统编程语言。用它的发明者，
diff --git a/zh-cn/c.md b/zh-cn/c.md
index da59489d..eab604b0 100644
--- a/zh-cn/c.md
+++ b/zh-cn/c.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Chenbo Li", "http://binarythink.net/"]
     - ["Jakukyo Friel", "http://weakish.github.io"]
-lang: zh-cn
 ---
 
 C语言在今天仍然是高性能计算的主要选择。
diff --git a/zh-cn/clojure-macros.md b/zh-cn/clojure-macros.md
index aaac5818..f9cb41ca 100644
--- a/zh-cn/clojure-macros.md
+++ b/zh-cn/clojure-macros.md
@@ -5,7 +5,6 @@ contributors:
     - ["Adam Bard", "http://adambard.com/"]
 translators:
     - ["Jakukyo Friel", "http://weakish.github.io"]
-lang: zh-cn
 ---
 
 和所有Lisp一样，Clojure内在的[同构性](https://en.wikipedia.org/wiki/Homoiconic)使得你可以穷尽语言的特性，编写生成代码的子过程——“宏”。宏是一种按需调制语言的强大方式。
diff --git a/zh-cn/clojure.md b/zh-cn/clojure.md
index faebdb5a..21c228c3 100644
--- a/zh-cn/clojure.md
+++ b/zh-cn/clojure.md
@@ -5,7 +5,6 @@ contributors:
     - ["Adam Bard", "http://adambard.com/"]
 translators:
     - ["Bill Zhang", "http://jingege.github.io/"]
-lang: zh-cn
 ---
 
 Clojure是运行在JVM上的Lisp家族中的一员。她比Common Lisp更强调纯[函数式编程](https://en.wikipedia.org/wiki/Functional_programming)，且自发布时便包含了一组工具来处理状态。
diff --git a/zh-cn/cmake.md b/zh-cn/cmake.md
index 415481ed..fee66627 100644
--- a/zh-cn/cmake.md
+++ b/zh-cn/cmake.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["tx23", "https://github.com/tx23"]
 filename: CMake-cn
-lang: zh-cn
 ---
 
 CMake 是一个跨平台且开源的自动化构建系统工具。通过该工具你可以对你的源代码进行测试、编译或创建安装包。
diff --git a/zh-cn/cobol.md b/zh-cn/cobol.md
index 75375e86..306c6e3c 100644
--- a/zh-cn/cobol.md
+++ b/zh-cn/cobol.md
@@ -5,7 +5,6 @@ contributors:
     - ["Hyphz", "http://github.com/hyphz/"]
 translators:
     - ["GOLGO11", "https://github.com/GOLGO11/"]
-lang: zh-cn
 ---
 COBOL是一门面向商业的语言，它从1960年最初设计以来被修订过数次。它被宣称仍然有超过80%的机构在使用它。
 
diff --git a/zh-cn/coffeescript.md b/zh-cn/coffeescript.md
index cfb0f8c5..0c87854d 100644
--- a/zh-cn/coffeescript.md
+++ b/zh-cn/coffeescript.md
@@ -6,7 +6,6 @@ contributors:
 translators:
   - ["Xavier Yao", "http://github.com/xavieryao"]
 filename: coffeescript-cn.coffee
-lang: zh-cn
 ---
 
 CoffeeScript是逐句编译为JavaScript的一种小型语言，且没有运行时的解释器。
diff --git a/zh-cn/common-lisp.md b/zh-cn/common-lisp.md
index b8979ed0..2bfd4583 100644
--- a/zh-cn/common-lisp.md
+++ b/zh-cn/common-lisp.md
@@ -6,7 +6,6 @@ contributors:
 translators:
   - ["Mac David", "http://macdavid313.com"]
   - ["mut0u", "http://github.com/mut0u"]
-lang: zh-cn
 ---
 
 ANSI Common Lisp 是一个广泛通用于各个工业领域的、支持多种范式的编程语言。
diff --git a/zh-cn/crystal.md b/zh-cn/crystal.md
index d1668159..e9dd1134 100644
--- a/zh-cn/crystal.md
+++ b/zh-cn/crystal.md
@@ -6,7 +6,6 @@ contributors:
     - ["Arnaud Fernandés", "https://github.com/TechMagister/"]
 translators:
     - ["Xuty", "https://github.com/xtyxtyx"]
-lang: zh-cn
 ---
 
 ```crystal
diff --git a/zh-cn/csharp.md b/zh-cn/csharp.md
index d11fcac5..e422d894 100644
--- a/zh-cn/csharp.md
+++ b/zh-cn/csharp.md
@@ -13,7 +13,6 @@ translators:
     - ["Jakukyo Friel", "http://weakish.github.io"]
     - ["CatfishWen", "http://catfishwen.github.io"]
 filename: LearnCSharp-cn.cs
-lang: zh-cn
 ---
 
 C#是一种优雅且类型安全的面向对象的语言，使开发人员能够构建运行在跨平台的.NET框架上，安全且健壮的应用程序。
diff --git a/zh-cn/css.md b/zh-cn/css.md
index 71b4abbc..3260d87c 100644
--- a/zh-cn/css.md
+++ b/zh-cn/css.md
@@ -5,7 +5,6 @@ contributors:
     - ["Marco Scannadinari", "https://github.com/marcoms"]
 translators:
     - ["Jakukyo Friel", "https://weakish.github.io"]
-lang: zh-cn
 filename: learncss-cn.css
 ---
 
diff --git a/zh-cn/dart.md b/zh-cn/dart.md
index 8419cce5..423e9681 100644
--- a/zh-cn/dart.md
+++ b/zh-cn/dart.md
@@ -1,6 +1,5 @@
 ---
 language: Dart
-lang: zh-cn
 filename: learndart-cn.dart
 contributors:
     - ["Joao Pedrosa", "https://github.com/jpedrosa/"]
diff --git a/zh-cn/docker.md b/zh-cn/docker.md
index 7b794345..d712d8f5 100644
--- a/zh-cn/docker.md
+++ b/zh-cn/docker.md
@@ -1,7 +1,6 @@
 ---
 category: tool
 tool: Docker
-lang: zh-cn
 filename: docker-cn.bat
 contributors:
     - ["Ruslan López", "http://javapro.org/"]
diff --git a/zh-cn/dynamic-programming.md b/zh-cn/dynamic-programming.md
index 6671b556..d9017e3f 100644
--- a/zh-cn/dynamic-programming.md
+++ b/zh-cn/dynamic-programming.md
@@ -5,7 +5,6 @@ contributors:
     - ["Akashdeep Goel", "http://github.com/akashdeepgoel"]
 translators:
    - ["EtaoinWu", "https://github.com/EtaoinWu"]
-lang: zh-cn
 ---
 
 # 动态规划
diff --git a/zh-cn/elisp.md b/zh-cn/elisp.md
index 3f4b687b..faad3789 100644
--- a/zh-cn/elisp.md
+++ b/zh-cn/elisp.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Chenbo Li", "http://binarythink.net"]
 filename: learn-emacs-lisp-zh.el
-lang: zh-cn
 ---
 
 ```scheme
diff --git a/zh-cn/elixir.md b/zh-cn/elixir.md
index 621999b6..cc9fcd59 100644
--- a/zh-cn/elixir.md
+++ b/zh-cn/elixir.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["lidashuang", "http://github.com/lidashuang"]
 filename: learnelixir-cn.ex
-lang: zh-cn
 ---
 
 Elixir 是一门构建在Erlang VM 之上的函数式编程语言。Elixir 完全兼容 Erlang, 
diff --git a/zh-cn/erlang.md b/zh-cn/erlang.md
index d5c323e2..6771b02e 100644
--- a/zh-cn/erlang.md
+++ b/zh-cn/erlang.md
@@ -1,6 +1,5 @@
 ---
 language: Erlang
-lang: zh-cn
 contributors:
     - ["Giovanni Cappellotto", "http://www.focustheweb.com/"]
 translators:
diff --git a/zh-cn/fortran.md b/zh-cn/fortran.md
index d1b31d2c..9ec5bec1 100644
--- a/zh-cn/fortran.md
+++ b/zh-cn/fortran.md
@@ -5,7 +5,6 @@ contributors:
     - ["Robert Steed", "https://github.com/robochat"]
 translators:
     - ["Corvusnest", "https://github.com/Corvusnest"]
-lang: zh-cn
 ---
 
 Fortran 是最古老的计算机语言之一。它由 IBM 开发于 1950 年用于数值运算（Fortran 为 "Formula
diff --git a/zh-cn/gdscript.md b/zh-cn/gdscript.md
index e5970b9d..890b3e71 100644
--- a/zh-cn/gdscript.md
+++ b/zh-cn/gdscript.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["ShiftWatchOut", "https://github.com/ShiftWatchOut"]
 filename: learngdscript-cn.gd
-lang: zh-cn
 ---
 
 GDScript 是一种动态类型的脚本语言，专门为免费开源游戏引擎 Godot 制作。 GDScript 的语法类似 Python。
diff --git a/zh-cn/git.md b/zh-cn/git.md
index cf70a154..d331d247 100644
--- a/zh-cn/git.md
+++ b/zh-cn/git.md
@@ -5,7 +5,6 @@ contributors:
     - ["Jake Prather", "http://github.com/JakeHP"]
 translators:
     - ["Chenbo Li", "http://binarythink.net"]
-lang: zh-cn
 ---
 
 Git是一个分布式版本控制及源代码管理工具 
diff --git a/zh-cn/go.md b/zh-cn/go.md
index 2d378860..13bf6c77 100644
--- a/zh-cn/go.md
+++ b/zh-cn/go.md
@@ -1,6 +1,5 @@
 ---
 language: Go
-lang: zh-cn
 filename: learngo-cn.go
 contributors:
     - ["Sonia Keys", "https://github.com/soniakeys"]
diff --git a/zh-cn/groovy.md b/zh-cn/groovy.md
index b1c1ed8e..cf143e8a 100644
--- a/zh-cn/groovy.md
+++ b/zh-cn/groovy.md
@@ -5,7 +5,6 @@ contributors:
     - ["Roberto Pérez Alcolea", "http://github.com/rpalcolea"]
 translators:
     - ["Todd Gao", "http://github.com/7c00"]
-lang: zh-cn
 ---
 
 Groovy - Java平台的动态语言。[了解更多](http://www.groovy-lang.org/)。
diff --git a/zh-cn/haskell.md b/zh-cn/haskell.md
index 57418ade..4cd4cd56 100644
--- a/zh-cn/haskell.md
+++ b/zh-cn/haskell.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Peiyong Lin", ""]
     - ["chad luo", "http://yuki.rocks"]
-lang: zh-cn
 ---
 
 Haskell 是一门实用的函数式编程语言，因其 Monads 与类型系统而闻名。而我使用它则是因为它异常优雅。用 Haskell 编程令我感到非常快乐。
diff --git a/zh-cn/html.md b/zh-cn/html.md
index a6436022..525c88d7 100644
--- a/zh-cn/html.md
+++ b/zh-cn/html.md
@@ -5,7 +5,6 @@ contributors:
     - ["Christophe THOMAS", "https://github.com/WinChris"]
 translators:
     - ["zxyqwe", "https://github.com/zxyqwe"]
-lang: zh-cn
 ---
 
 HTML是超文本标记语言的缩写。
diff --git a/zh-cn/java.md b/zh-cn/java.md
index cfa8049a..fc924d31 100644
--- a/zh-cn/java.md
+++ b/zh-cn/java.md
@@ -1,7 +1,6 @@
 ---
 category: language
 language: Java
-lang: zh-cn
 filename: LearnJava-zh.java
 contributors:
     - ["Jake Prather", "http://github.com/JakeHP"]
diff --git a/zh-cn/javascript.md b/zh-cn/javascript.md
index 7741ad3f..30bc0f84 100644
--- a/zh-cn/javascript.md
+++ b/zh-cn/javascript.md
@@ -8,7 +8,6 @@ contributors:
 translators:
     - ["Chenbo Li", "http://binarythink.net"]
     - ["Guodong Qu", "https://github.com/jasonqu"]
-lang: zh-cn
 ---
 
 JavaScript 于 1995 年由网景公司的 Brendan Eich 发明。最初它作为一种简单的，用于开发网站的脚本语言而被发明出来，是用于开发复杂网站的 Java 的补充。但由于它与网页结合度很高并且在浏览器中得到内置的支持，所以在网页前端领域 JavaScript 变得比 Java 更流行了。
diff --git a/zh-cn/jquery.md b/zh-cn/jquery.md
index 8c5bafe3..db41bcb0 100644
--- a/zh-cn/jquery.md
+++ b/zh-cn/jquery.md
@@ -5,7 +5,6 @@ contributors:
     - ["Sawyer Charles", "https://github.com/xssc"]
 translators:
     - ["zxyqwe", "https://github.com/zxyqwe"]
-lang: zh-cn
 filename: jquery-cn.js
 ---
 
diff --git a/zh-cn/json.md b/zh-cn/json.md
index 10f3a6da..0b532b6c 100644
--- a/zh-cn/json.md
+++ b/zh-cn/json.md
@@ -5,7 +5,6 @@ contributors:
 translators:
   - ["Zach Zhang", "https://github.com/checkcheckzz"]
 filename: learnjson-cn.json
-lang: zh-cn
 ---
 
 JSON是一个极其简单的数据交换格式。按[json.org](https://json.org)说的，它对人类易读易写，对机器易解析易生成。
diff --git a/zh-cn/julia.md b/zh-cn/julia.md
index 3b53160a..2896d804 100644
--- a/zh-cn/julia.md
+++ b/zh-cn/julia.md
@@ -8,7 +8,6 @@ contributors:
 translators:
     - ["Jichao Ouyang", "http://oyanglul.us"]
     - ["woclass", "https://github.com/inkydragon"]
-lang: zh-cn
 ---
 
 Julia 是一种新的同像函数式编程语言(homoiconic functional language)，它专注于科学计算领域。
diff --git a/zh-cn/kotlin.md b/zh-cn/kotlin.md
index 8e974e8e..87490d1f 100644
--- a/zh-cn/kotlin.md
+++ b/zh-cn/kotlin.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Jimin Lu", "https://github.com/lujimin"]
 filename: LearnKotlin-cn.kt
-lang: zh-cn
 ---
 
 Kotlin是一门适用于JVM、Android和浏览器的静态类型编程语言。它100%兼容Java。
diff --git a/zh-cn/lambda-calculus.md b/zh-cn/lambda-calculus.md
index 7719ee71..c0919882 100644
--- a/zh-cn/lambda-calculus.md
+++ b/zh-cn/lambda-calculus.md
@@ -1,7 +1,6 @@
 ---
 category: Algorithms & Data Structures
 name: Lambda Calculus
-lang: zh-cn
 contributors:
     - ["Max Sun", "http://github.com/maxsun"]
     - ["Yan Hui Hang", "http://github.com/yanhh0"]
diff --git a/zh-cn/latex.md b/zh-cn/latex.md
index ea11d495..1dde53b3 100644
--- a/zh-cn/latex.md
+++ b/zh-cn/latex.md
@@ -9,7 +9,6 @@ contributors:
 translators:
     - ["Dp Leo", "https://github.com/minoriwww"]
 filename: learn-latex-cn.tex
-lang: zh-cn
 ---
 
 ```tex
diff --git a/zh-cn/less.md b/zh-cn/less.md
index b96ec671..1c2ecbe9 100644
--- a/zh-cn/less.md
+++ b/zh-cn/less.md
@@ -5,7 +5,6 @@ contributors:
   - ["Saravanan Ganesh", "http://srrvnn.me"]
 translators:
    - ["Jiang Haiyun", "http://www.atjiang.com"]
-lang: zh-cn
 ---
 
 
diff --git a/zh-cn/livescript.md b/zh-cn/livescript.md
index c19837e4..95f7c37c 100644
--- a/zh-cn/livescript.md
+++ b/zh-cn/livescript.md
@@ -5,7 +5,6 @@ contributors:
     - ["Christina Whyte", "http://github.com/kurisuwhyte/"]
 translators:
     - ["ShengDa Lyu", "http://github.com/SDLyu/"]
-lang: zh-cn    
 ---
 
 LiveScript 是一种具有函数式特性且编译成 JavaScript 的语言，能对应 JavaScript 的基本语法。
diff --git a/zh-cn/lua.md b/zh-cn/lua.md
index 920725e8..47d00973 100644
--- a/zh-cn/lua.md
+++ b/zh-cn/lua.md
@@ -1,6 +1,5 @@
 ---
 language: Lua
-lang: zh-cn
 contributors:
     - ["Tyler Neylon", "http://tylerneylon.com/"]
     - ["Rob Hoelz", "http://hoelz.ro"]
diff --git a/zh-cn/make.md b/zh-cn/make.md
index 9ea88613..f8dc5eaa 100644
--- a/zh-cn/make.md
+++ b/zh-cn/make.md
@@ -7,7 +7,6 @@ contributors:
 translators:
 - ["Jichao Ouyang", "https://github.com/jcouyang"]
 filename: Makefile-cn
-lang: zh-cn
 ---
 
 Makefile 用于定义如何创建目标文件, 比如如何从源码到可执行文件. 创建这一工具的目标是
diff --git a/zh-cn/markdown.md b/zh-cn/markdown.md
index 4ad96684..e2180c4f 100644
--- a/zh-cn/markdown.md
+++ b/zh-cn/markdown.md
@@ -8,7 +8,6 @@ translators:
     - ["Yuchen Liu", "https://github.com/smallg0at"]
     - ["Coldle", "https://github.com/yocoldle"]
 filename: learnmarkdown-cn.md
-lang: zh-cn
 ---
 
 Markdown 由 John Gruber 于 2004年创立. 它旨在成为一门容易读写的语法结构，并可以便利地转换成 HTML（以及其他很多）格式。
diff --git a/zh-cn/matlab.md b/zh-cn/matlab.md
index 009020ff..95e5367a 100644
--- a/zh-cn/matlab.md
+++ b/zh-cn/matlab.md
@@ -6,7 +6,6 @@ contributors:
     - ["jamesscottbrown", "http://jamesscottbrown.com"]
 translators:
     - ["sunxb10", "https://github.com/sunxb10"]
-lang: zh-cn
 ---
 
 MATLAB 是 MATrix LABoratory（矩阵实验室）的缩写。
diff --git a/zh-cn/mips.md b/zh-cn/mips.md
index 3db5387b..2681964b 100644
--- a/zh-cn/mips.md
+++ b/zh-cn/mips.md
@@ -5,7 +5,6 @@ contributors:
     - ["Stanley Lim", "https://github.com/Spiderpig86"]
 translators:
     - ["Liu Yihua", "https://github.com/yihuajack"]
-lang: zh-cn
 ---
 
 MIPS（Microprocessor without Interlocked Pipeline Stages）汇编语言是为了配合约翰·雷洛伊·亨尼西于1981年设计的 MIPS 微处理器范式而设计的，这些 RISC 处理器用于嵌入式系统，例如网关和路由器。
diff --git a/zh-cn/nim.md b/zh-cn/nim.md
index fa7d8259..1eb1db40 100644
--- a/zh-cn/nim.md
+++ b/zh-cn/nim.md
@@ -6,7 +6,6 @@ contributors:
     - ["Dennis Felsing", "https://dennis.felsing.org"]
 translators:
     - ["lzw-723", "https://github.com/lzw-723"]
-lang: zh-cn
 ---
 
 Nim(原名Nimrod)是一种静态类型的命令式编程语言，
diff --git a/zh-cn/objective-c.md b/zh-cn/objective-c.md
index 14fe0900..dd97e9cf 100644
--- a/zh-cn/objective-c.md
+++ b/zh-cn/objective-c.md
@@ -9,7 +9,6 @@ contributors:
 translators:
     - ["Gaoang Chen", "https://github.com/chengaoang"]
 filename: LearnObjectiveC-cn.m
-lang: zh-cn
 ---
 Objective-C（Objective-C 2.0）是苹果公司用于 macOS 和 iOS 操作系统以及相应的框架 Cocoa 和 Cocoa Touch 的主要编程语言。
 它是一种面向对象的通用编程语言，为 C 语言添加了 Smalltalk 风格的消息传递机制。
diff --git a/zh-cn/opencv.md b/zh-cn/opencv.md
index 596430f6..b91cdb15 100644
--- a/zh-cn/opencv.md
+++ b/zh-cn/opencv.md
@@ -6,7 +6,6 @@ contributors:
     - ["Yogesh Ojha", "http://github.com/yogeshojha"]
 translators:
     - ["GengchenXU", "https://github.com/GengchenXU"]
-lang: zh-cn
 ---
 
 OpenCV（开源计算机视觉）是一个编程功能库，主要面向实时计算机视觉。最初由英特尔开发，后来由Willow Garage，然后Itseez（后来被英特尔收购）支持。OpenCV 目前支持多种语言，如C++、Python、Java 等
diff --git a/zh-cn/perl.md b/zh-cn/perl.md
index 6b3f9cc9..035ae34e 100644
--- a/zh-cn/perl.md
+++ b/zh-cn/perl.md
@@ -6,7 +6,6 @@ contributors:
     - ["Korjavin Ivan", "http://github.com/korjavin"]
 translators:
     - ["Yadong Wen", "https://github.com/yadongwen"]
-lang: zh-cn
 ---
 
 Perl 是一个功能强大、特性齐全的编程语言，有25年的历史。
diff --git a/zh-cn/php.md b/zh-cn/php.md
index 2f95fc6f..911527db 100644
--- a/zh-cn/php.md
+++ b/zh-cn/php.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Chenbo Li", "http://binarythink.net"]
 filename: learnphp-zh.php
-lang: zh-cn
 ---
 
 这份教程所使用的版本是 PHP 5+.
diff --git a/zh-cn/powershell.md b/zh-cn/powershell.md
index b7780819..26b86e48 100644
--- a/zh-cn/powershell.md
+++ b/zh-cn/powershell.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Feng Gao", "https://github.com/gaufung"]
 filename: LearnPowershell-cn.ps1
-lang: zh-cn
 ---
 
 PowerShell 是 Windows 平台下的脚本语言同时也是配置管理框架，它是建立在微软 .Net Framework 之上，Windows 7 以及之后版本都内置 Poweshell。下面的示例中都是 PoweShell 脚本的一部分或者直接能够在 Shell 交互窗口中执行。
diff --git a/zh-cn/pyqt.md b/zh-cn/pyqt.md
index 643a4fb3..94d9adac 100644
--- a/zh-cn/pyqt.md
+++ b/zh-cn/pyqt.md
@@ -8,7 +8,6 @@ translators:
     - ["kdxcxs", "https://github.com/kdxcxs"]
     - ["lsvih", "https://github.com/lsvih"]
     - ["imlonghao", "https://github.com/imlonghao"]
-lang: zh-cn
 ---
 
 **Qt** 是一个用 C++ 实现的著名跨平台软件开发框架。只需少量更改有时候甚至不需要更改代码就能在多个软硬件平台上运行，同时拥有原生应用程序的功能和速度。
diff --git a/zh-cn/python.md b/zh-cn/python.md
index 04691ff6..dd69a87c 100644
--- a/zh-cn/python.md
+++ b/zh-cn/python.md
@@ -8,7 +8,6 @@ translators:
     - ["Geoff Liu", "http://geoffliu.me"]
     - ["Maple", "https://github.com/mapleincode"]
 filename: learnpython-cn.py
-lang: zh-cn
 ---
 
 Python 是由吉多·范罗苏姆(Guido Van Rossum)在 90 年代早期设计。
diff --git a/zh-cn/pythonlegacy.md b/zh-cn/pythonlegacy.md
index b4083566..97685614 100644
--- a/zh-cn/pythonlegacy.md
+++ b/zh-cn/pythonlegacy.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Chenbo Li", "http://binarythink.net"]
 filename: learnpythonlegacy-zh.py
-lang: zh-cn
 ---
 
 Python 由 Guido Van Rossum 在90年代初创建。 它现在是最流行的语言之一
diff --git a/zh-cn/qt.md b/zh-cn/qt.md
index 2e288721..6c4d4539 100644
--- a/zh-cn/qt.md
+++ b/zh-cn/qt.md
@@ -7,7 +7,6 @@ contributors:
     - ["Aleksey Kholovchuk", "https://github.com/vortexxx192"]
 translators:
     - ["GengchenXU", "https://github.com/GengchenXU"]
-lang: zh-cn
     
 ---
 
diff --git a/zh-cn/r.md b/zh-cn/r.md
index 4673e861..f84c0570 100644
--- a/zh-cn/r.md
+++ b/zh-cn/r.md
@@ -7,7 +7,6 @@ translators:
     - ["小柒", "http://weibo.com/u/2328126220"]
     - ["alswl", "https://github.com/alswl"]
 filename: learnr-zh.r
-lang: zh-cn
 ---
 
 R 是一门统计语言。它有很多数据分析和挖掘程序包。可以用来统计、分析和制图。
diff --git a/zh-cn/racket.md b/zh-cn/racket.md
index 7b502f4d..02569a46 100644
--- a/zh-cn/racket.md
+++ b/zh-cn/racket.md
@@ -1,7 +1,6 @@
 ---
 
 language: Racket
-lang: zh-cn
 filename: learnracket-zh.rkt
 contributors:
   - ["th3rac25", "https://github.com/voila"]
diff --git a/zh-cn/raylib.md b/zh-cn/raylib.md
index 407769d4..b7b7e020 100644
--- a/zh-cn/raylib.md
+++ b/zh-cn/raylib.md
@@ -1,7 +1,6 @@
 ---
 category: framework
 framework: raylib
-lang: zh-cn
 filename: learnraylib-cn.c
 contributors:
     - ["Nikolas Wipper", "https://notnik.cc"]
diff --git a/zh-cn/red.md b/zh-cn/red.md
index 6c1d4735..b7946f2f 100644
--- a/zh-cn/red.md
+++ b/zh-cn/red.md
@@ -6,7 +6,6 @@ contributors:
     - ["Arnold van Hofwegen", "https://github.com/iArnold"]
 translators:
     - ["Limo Saplf", "https://github.com/saplf"]
-lang: zh-cn
 ---
 
 Red 的编写是出于工作需要，该语言的作者想要使用 REBOL，但它有许多缺陷。
diff --git a/zh-cn/ruby.md b/zh-cn/ruby.md
index 68ea7909..5a15fe8e 100644
--- a/zh-cn/ruby.md
+++ b/zh-cn/ruby.md
@@ -1,7 +1,6 @@
 ---
 language: Ruby
 filename: learnruby-zh.rb
-lang: zh-cn
 contributors:
   - ["David Underwood", "http://theflyingdeveloper.com"]
   - ["Joel Walden", "http://joelwalden.net"]
diff --git a/zh-cn/rust.md b/zh-cn/rust.md
index a38b64cd..d863793f 100644
--- a/zh-cn/rust.md
+++ b/zh-cn/rust.md
@@ -5,7 +5,6 @@ contributors:
 translators:
     - ["Guangming Mao", "http://maogm.com"]
 filename: learnrust-cn.rs
-lang: zh-cn
 ---
 
 Rust 是由 Mozilla 研究院开发的编程语言。Rust 将底层的性能控制与高级语言的便利性和安全保障结合在了一起。
diff --git a/zh-cn/sass.md b/zh-cn/sass.md
index 1c6e4025..167fd682 100644
--- a/zh-cn/sass.md
+++ b/zh-cn/sass.md
@@ -8,7 +8,6 @@ contributors:
   - ["Keith Miyake", "https://github.com/kaymmm"]
 translators:
    - ["Jiang Haiyun", "http://www.atjiang.com"]
-lang: zh-cn
 ---
 
 Sass是一种CSS扩展语言，它增加了诸如变量、嵌套、mixin等功能。
diff --git a/zh-cn/scala.md b/zh-cn/scala.md
index e90a44ae..164a2a54 100644
--- a/zh-cn/scala.md
+++ b/zh-cn/scala.md
@@ -9,7 +9,6 @@ translators:
     - ["Peiyong Lin", ""]
     - ["Jinchang Ye", "http://github.com/alwayswithme"]
     - ["Guodong Qu", "https://github.com/jasonqu"]
-lang: zh-cn
 ---
 
 Scala - 一门可拓展的语言
diff --git a/zh-cn/set-theory.md b/zh-cn/set-theory.md
index 2fdc6ea5..73ce1975 100644
--- a/zh-cn/set-theory.md
+++ b/zh-cn/set-theory.md
@@ -5,7 +5,6 @@ contributors:
     - ["Andrew Ryan Davis", "https://github.com/AndrewDavis1191"]
 translators:
     - ["Tianchen Xu", "https://github.com/lo0b0o"]
-lang: zh-cn
 ---
 
 集合论是数学的一个分支，研究集合、它们的运算和它们的性质。
diff --git a/zh-cn/solidity.md b/zh-cn/solidity.md
index 9969b1ef..965181c1 100644
--- a/zh-cn/solidity.md
+++ b/zh-cn/solidity.md
@@ -1,7 +1,6 @@
 ---
 language: Solidity
 filename: learnSolidity-cn.sol
-lang: zh-cn
 contributors:
   - ["Nemil Dalal", "https://www.nemil.com"]
   - ["Joseph Chow", ""]
diff --git a/zh-cn/sql.md b/zh-cn/sql.md
index 969da7d6..be2d720a 100644
--- a/zh-cn/sql.md
+++ b/zh-cn/sql.md
@@ -5,7 +5,6 @@ contributors:
   - ["Bob DuCharme", "http://bobdc.com/"]
 translators:
   - ["Shuxin Shu", "https://github.com/NamelessAshone"]
-lang: zh-cn
 ---
 
 结构化查询语言(SQL)是一个ISO标准语言，用于创建和管理数据库，
diff --git a/zh-cn/standard-ml.md b/zh-cn/standard-ml.md
index a5428412..48addefc 100644
--- a/zh-cn/standard-ml.md
+++ b/zh-cn/standard-ml.md
@@ -8,7 +8,6 @@ contributors:
 filename: standard-ml-cn.sml
 translators:
    - ["Buqian Zheng", "https://github.com/zhengbuqian"]
-lang: zh-cn
 ---
 
 Standard ML是一门拥有类型推断和一些副作用的函数式编程语言。学习Standard ML的一些
diff --git a/zh-cn/swift.md b/zh-cn/swift.md
index bdf35864..ca1fa646 100644
--- a/zh-cn/swift.md
+++ b/zh-cn/swift.md
@@ -7,7 +7,6 @@ translators:
   - ["Xavier Yao", "http://github.com/xavieryao"]
   - ["Joey Huang", "http://github.com/kamidox"]
   - ["CY Lim", "http://github.com/cylim"]
-lang: zh-cn
 ---
 
 Swift 是 Apple 开发的用于 iOS 和 macOS 开发的编程语言。Swift 于2014年 Apple WWDC （全球开发者大会）中被引入，用以与 Objective-C 共存，同时对错误代码更具弹性。Swift 由 Xcode 6 beta 中包含的 LLVM 编译器编译。
diff --git a/zh-cn/tmux.md b/zh-cn/tmux.md
index 5734445e..3f0720e3 100644
--- a/zh-cn/tmux.md
+++ b/zh-cn/tmux.md
@@ -6,7 +6,6 @@ contributors:
     - ["mdln", "https://github.com/mdln"]
 translators:
     - ["Arnie97", "https://github.com/Arnie97"]
-lang: zh-cn
 ---
 
 
diff --git a/zh-cn/typescript.md b/zh-cn/typescript.md
index ce8f671c..97cb77e7 100644
--- a/zh-cn/typescript.md
+++ b/zh-cn/typescript.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Shawn Zhang", "https://github.com/shawnzhang009"]
 filename: learntypescript-cn.ts
-lang: zh-cn
 ---
 
 TypeScript 是一门为开发大型 JavaScript 应用而设计的语言。TypeScript 在 JavaScript 的基础上增加了类、模块、接口、泛型和静态类型（可选）等常见的概念。它是 JavaScript 的超集：所有 JavaScript 代码都是有效的 TypeScript 代码，因此任何 JavaScript 项目都可以无缝引入 TypeScript，TypeScript 编译器最终会把 TypeScript 代码编译成 JavaScript 代码。
diff --git a/zh-cn/vim.md b/zh-cn/vim.md
index 602eb228..f1668541 100644
--- a/zh-cn/vim.md
+++ b/zh-cn/vim.md
@@ -6,7 +6,6 @@ contributors:
    - ["RadhikaG", "https://github.com/RadhikaG"]
 translators:
    - ["Jiang Haiyun", "https://github.com/haiiiiiyun"]
-lang: zh-cn
 ---
 
 
diff --git a/zh-cn/visualbasic.md b/zh-cn/visualbasic.md
index 236c10b5..494a1754 100644
--- a/zh-cn/visualbasic.md
+++ b/zh-cn/visualbasic.md
@@ -4,7 +4,6 @@ contributors:
     - ["Brian Martin", "http://brianmartin.biz"]
 translators:
     - ["Abner Chou", "http://cn.abnerchou.me"]
-lang: zh-cn
 filename: learnvisualbasic-cn.vb
 ---
 
diff --git a/zh-cn/wolfram.md b/zh-cn/wolfram.md
index c13a0b85..31d2dfdc 100644
--- a/zh-cn/wolfram.md
+++ b/zh-cn/wolfram.md
@@ -5,7 +5,6 @@ contributors:
 translators:
   - ["wuyudi", "http://github.com/wuyudi/"]
 filename: learnwolfram-cn.nb
-lang: zh-cn
 ---
 
 Wolfram 语言是最初在 Mathematica 中使用的底层语言，但现在可用于多种场合。
diff --git a/zh-cn/xml.md b/zh-cn/xml.md
index bf16ede0..6210fe79 100644
--- a/zh-cn/xml.md
+++ b/zh-cn/xml.md
@@ -5,7 +5,6 @@ contributors:
 translators:
   - ["Zach Zhang", "https://github.com/checkcheckzz"]
 filename: learnxml-cn.xml
-lang: zh-cn
 ---
 
 XML是一种标记语言，被设计用来存储数据和传输数据。
diff --git a/zh-cn/yaml.md b/zh-cn/yaml.md
index b9f27c9c..7dedc748 100644
--- a/zh-cn/yaml.md
+++ b/zh-cn/yaml.md
@@ -7,7 +7,6 @@ translators:
   - ["Jiang Haiyun", "https://github.com/haiiiiiyun"]
   - ["Wen Sun", "https://github.com/HermitSun"]
 filename: learnyaml-cn.yaml
-lang: zh-cn
 ---
 
 YAML 是一种数据序列化语言，旨在让人类直接可写可读。
diff --git a/zh-cn/zfs.md b/zh-cn/zfs.md
index a9f1807a..917497fa 100644
--- a/zh-cn/zfs.md
+++ b/zh-cn/zfs.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Alan Cheng", "https://github.com/kedaio"]
 filename: LearnZfs-cn.txt
-lang: zh-cn
 ---
 
 [ZFS](http://open-zfs.org/wiki/Main_Page)
diff --git a/zh-tw/bash.md b/zh-tw/bash.md
index 47127d6c..ae804a75 100644
--- a/zh-tw/bash.md
+++ b/zh-tw/bash.md
@@ -19,7 +19,6 @@ translators:
     - ["Chunyang Xu", "https://github.com/XuChunyang"]
     - ["Weihang Lo", "https://github.com/weihanglo"]
 filename: LearnBash-tw.sh
-lang: zh-tw
 ---
 
 Bash 是一個爲 GNU 計劃編寫的 Unix shell，是 Linux 和 macOS 下預設的 shell。
diff --git a/zh-tw/dart.md b/zh-tw/dart.md
index 86c11cdd..ec2f2e84 100644
--- a/zh-tw/dart.md
+++ b/zh-tw/dart.md
@@ -1,6 +1,5 @@
 ---
 language: Dart
-lang: zh-tw
 filename: learndart-tw.dart
 contributors:
     - ["Joao Pedrosa", "https://github.com/jpedrosa/"]
diff --git a/zh-tw/elixir.md b/zh-tw/elixir.md
index 9e38a654..c16290ea 100644
--- a/zh-tw/elixir.md
+++ b/zh-tw/elixir.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Tai An Su", "https://github.com/taiansu"]
 filename: learnelixir-tw.ex
-lang: zh-tw
 ---
 
 Elixir 是一門建構在 Erlang 虛擬機上的現代函數式語言。它完全與 Erlang 相容，但
diff --git a/zh-tw/javascript.md b/zh-tw/javascript.md
index c7851fa9..9ca07f83 100644
--- a/zh-tw/javascript.md
+++ b/zh-tw/javascript.md
@@ -7,7 +7,6 @@ contributors:
     - ["Ariel Krakowski", "http://www.learneroo.com"]
 translators:
     - ["Woody Chang", "https://github.com/kazettique"]
-lang: zh-tw
 ---
 
 JavaScript 是由網景公司（Netscape）的布蘭登·艾克（Brendan Eich）於 1995 年創建的。它最初被設計為一種更簡單的網站腳本語言，用於補足 Java 在更複雜的網路應用程式中使用，但由於它與網頁的高度整合，以及瀏覽器對 JavaScript 的原生支援，使得它在網頁前端的應用遠比 Java 更加普及。
diff --git a/zh-tw/pcre.md b/zh-tw/pcre.md
index 3b2ff3f7..e36e0e09 100644
--- a/zh-tw/pcre.md
+++ b/zh-tw/pcre.md
@@ -5,7 +5,6 @@ contributors:
     - ["Sachin Divekar", "http://github.com/ssd532"]
 translators:
     - ["Michael Yeh", "https://hinet60613.github.io/"]
-lang: zh-tw
 ---
 
 正規表達式(regular expression，或縮寫為regex, regexp)是一種用來表示搜尋模式的特殊字串。例如，你可以用`/^[a-z]+:/`來從網址`http://github.com`中擷取出`http:`這段http協定名稱。
diff --git a/zh-tw/perl.md b/zh-tw/perl.md
index 633314a1..32f4f06f 100644
--- a/zh-tw/perl.md
+++ b/zh-tw/perl.md
@@ -8,7 +8,6 @@ contributors:
 translators:
     - ["Kang-min Liu", "https://gugod.org"]
     - ["Shih-Kai Chiu", "https://twitter.com/zard1989"]
-lang: zh-tw
 ---
 
 Perl 5 是一款強大且功能豐富的程式語言，已經持續發展超過 25 年。
diff --git a/zh-tw/pythonlegacy.md b/zh-tw/pythonlegacy.md
index 8f584013..b551a938 100644
--- a/zh-tw/pythonlegacy.md
+++ b/zh-tw/pythonlegacy.md
@@ -8,7 +8,6 @@ contributors:
 translators:
     - ["Michael Yeh", "https://hinet60613.github.io/"]
 filename: learnpythonlegacy-tw.py
-lang: zh-tw
 ---
 
 Python是在1990年代早期由Guido Van Rossum創建的。它是現在最流行的程式語言之一。我愛上Python是因為他極為清晰的語法，甚至可以說它就是可執行的虛擬碼。
diff --git a/zh-tw/typescript.md b/zh-tw/typescript.md
index f9ac30a0..df991ac2 100644
--- a/zh-tw/typescript.md
+++ b/zh-tw/typescript.md
@@ -6,7 +6,6 @@ contributors:
 translators:
     - ["Woody Chang", "https://github.com/kazettique"]
 filename: learntypescript-zh-tw.ts
-lang: zh-tw
 ---
 
 TypeScript 是為開發大型 JavaScript 應用程式而設計的語言。它為 JavaScript 導入某些程式語言常見的一些概念，諸如：類別（class）、模組（module）、介面（interface）、泛型（generic type）和靜態型別（static type）。TypeScript 是 JavaScript 的「超集」（superset）：意即建立在 JavaScript 的基礎上，所有 JavaScript 語法皆可在 TypeScript 中使用。因此，TypeScript 可以無縫導入到任何 JavaScript 專案中。TypeScript 編譯器最終會編譯成 JavaScript 程式碼。