diff --git a/CHICKEN.html.markdown b/CHICKEN.html.markdown
index 080527a9..5d1daa4c 100644
--- a/CHICKEN.html.markdown
+++ b/CHICKEN.html.markdown
@@ -235,12 +235,12 @@ sqr                        ;; => #<procedure (sqr x)>
 (= 2 1)                    ;; => #f
 
 ;; 'eq?' returns #t if two arguments refer to the same object in memory
-;; In other words, it's a simple pointer comparision.
+;; In other words, it's a simple pointer comparison.
 (eq? '() '())              ;; => #t ;; there's only one empty list in memory
 (eq? (list 3) (list 3))    ;; => #f ;; not the same object
 (eq? 'yes 'yes)            ;; => #t
 (eq? 3 3)                  ;; => #t ;; don't do this even if it works in this case
-(eq? 3 3.0)                ;; => #f ;; it's better to use '=' for number comparisions
+(eq? 3 3.0)                ;; => #f ;; it's better to use '=' for number comparisons
 (eq? "Hello" "Hello")      ;; => #f
 
 ;; 'eqv?' is same as 'eq?' all datatypes except numbers and characters
diff --git a/awk.html.markdown b/awk.html.markdown
index 90f88b1a..8a9b4fd7 100644
--- a/awk.html.markdown
+++ b/awk.html.markdown
@@ -264,7 +264,7 @@ function io_functions(    localvar) {
     # automatically for you.
 
     # You can probably guess there are other $ variables. Every line is
-    # implicitely split before every action is called, much like the shell
+    # implicitly split before every action is called, much like the shell
     # does. And, like the shell, each field can be access with a dollar sign
 
     # This will print the second and fourth fields in the line
diff --git a/c.html.markdown b/c.html.markdown
index 18503eab..637311ca 100644
--- a/c.html.markdown
+++ b/c.html.markdown
@@ -336,10 +336,10 @@ int main (int argc, char** argv)
         goto error;
   }
   error :
-  printf("Error occured at i = %d & j = %d.\n", i, j);
+  printf("Error occurred at i = %d & j = %d.\n", i, j);
   /*
   https://ideone.com/GuPhd6
-  this will print out "Error occured at i = 52 & j = 99."
+  this will print out "Error occurred at i = 52 & j = 99."
   */
 
   ///////////////////////////////////////
diff --git a/chapel.html.markdown b/chapel.html.markdown
index 68ce49cd..96ddc69d 100644
--- a/chapel.html.markdown
+++ b/chapel.html.markdown
@@ -242,7 +242,7 @@ do {
 } while (j <= 10000);
 writeln(jSum);
 
-// for loops are much like those in python in that they iterate over a
+// for loops are much like those in Python in that they iterate over a
 // range. Ranges (like the 1..10 expression below) are a first-class object
 // in Chapel, and as such can be stored in variables.
 for i in 1..10 do write(i, ", ");
@@ -1064,14 +1064,14 @@ proc main() {
     }
   }
 
-// Heres an example using atomics and a sync variable to create a
+// Here's an example using atomics and a sync variable to create a
 // count-down mutex (also known as a multiplexer).
   var count: atomic int; // our counter
   var lock$: sync bool;   // the mutex lock
 
   count.write(2);       // Only let two tasks in at a time.
   lock$.writeXF(true);  // Set lock$ to full (unlocked)
-  // Note: The value doesnt actually matter, just the state
+  // Note: The value doesn't actually matter, just the state
   // (full:unlocked / empty:locked)
   // Also, writeXF() fills (F) the sync var regardless of its state (X)
 
diff --git a/cmake.html.markdown b/cmake.html.markdown
index 45cf0585..c705beea 100644
--- a/cmake.html.markdown
+++ b/cmake.html.markdown
@@ -28,8 +28,8 @@ are used in the usual way.
 #  - cmake ..
 #  - make
 # 
-# With those steps, we will follow the best pratice to compile into a subdir
-# and the second line will request to CMake to generate a new OS-dependant
+# With those steps, we will follow the best practice to compile into a subdir
+# and the second line will request to CMake to generate a new OS-dependent
 # Makefile. Finally, run the native Make command.
 
 #------------------------------------------------------------------------------
diff --git a/crystal.html.markdown b/crystal.html.markdown
index 1449ff81..15cbc0b1 100644
--- a/crystal.html.markdown
+++ b/crystal.html.markdown
@@ -215,7 +215,7 @@ Range.new(1, 10).class #=> Range(Int32, Int32)
 # possibly different types.
 {1, "hello", 'x'}.class #=> Tuple(Int32, String, Char)
 
-# Acces tuple's value by its index
+# Access tuple's value by its index
 tuple = {:key1, :key2}
 tuple[1] #=> :key2
 tuple[2] #=> syntax error : Index out of bound
diff --git a/cypher.html.markdown b/cypher.html.markdown
index 44db26ae..b7be544a 100644
--- a/cypher.html.markdown
+++ b/cypher.html.markdown
@@ -20,7 +20,7 @@ Nodes
 It's an empty *node*, to indicate that there is a *node*, but it's not relevant for the query.
 
 ```(n)```
-It's a *node* refered by the variable **n**, reusable in the query. It begins with lowercase and uses camelCase.
+It's a *node* referred by the variable **n**, reusable in the query. It begins with lowercase and uses camelCase.
 
 ```(p:Person)```
 You can add a *label* to your node, here **Person**. It's like a type / a class / a category. It begins with uppercase and uses camelCase.
@@ -53,7 +53,7 @@ Relationships (or Edges)
 It's a *relationship* with the *label* **KNOWS**. It's a *label* as the node's label. It begins with uppercase and use UPPER_SNAKE_CASE.
 
 ```[k:KNOWS]```
-The same *relationship*, refered by the variable **k**, reusable in the query, but it's not necessary.
+The same *relationship*, referred by the variable **k**, reusable in the query, but it's not necessary.
 
 ```[k:KNOWS {since:2017}]```
 The same *relationship*, with *properties* (like *node*), here **since**.
@@ -244,6 +244,6 @@ Special hints
 ---
 
 - There is just single-line comments in Cypher, with double-slash : // Comments
-- You can execute a Cypher script stored in a **.cql** file directly in Neo4j (it's an import). However, you can't have multiple statements in this file (separed by **;**).
+- You can execute a Cypher script stored in a **.cql** file directly in Neo4j (it's an import). However, you can't have multiple statements in this file (separated by **;**).
 - Use the Neo4j shell to write Cypher, it's really awesome.
 - The Cypher will be the standard query language for all graph databases (known as **OpenCypher**).
diff --git a/edn.html.markdown b/edn.html.markdown
index ca04df89..79107269 100644
--- a/edn.html.markdown
+++ b/edn.html.markdown
@@ -32,7 +32,7 @@ false
 "hungarian breakfast"
 "farmer's cheesy omelette"
 
-; Characters are preceeded by backslashes
+; Characters are preceded by backslashes
 \g \r \a \c \e
 
 ; Keywords start with a colon. They behave like enums. Kind of
@@ -42,7 +42,7 @@ false
 :olives
 
 ; Symbols are used to represent identifiers. They start with #.
-; You can namespace symbols by using /. Whatever preceeds / is
+; You can namespace symbols by using /. Whatever precedes / is
 ; the namespace of the name.
 #spoon
 #kitchen/spoon ; not the same as #spoon
diff --git a/elm.html.markdown b/elm.html.markdown
index 99c23980..23ae9eeb 100644
--- a/elm.html.markdown
+++ b/elm.html.markdown
@@ -286,7 +286,7 @@ leftmostElement tree =
 -- Put this at the top of the file. If omitted, you're in Main.
 module Name where
 
--- By default, everything is exported. You can specify exports explicity.
+-- By default, everything is exported. You can specify exports explicitly.
 module Name (MyType, myValue) where
 
 -- One common pattern is to export a union type but not its tags. This is known
diff --git a/fa-ir/java-fa.html.markdown b/fa-ir/java-fa.html.markdown
index e8182e81..cb965fc4 100644
--- a/fa-ir/java-fa.html.markdown
+++ b/fa-ir/java-fa.html.markdown
@@ -54,7 +54,7 @@ public class LearnJava {
     ///////////////////////////////////////
 
         /*
-        * Ouput
+        * Output
         */
 
         // Use System.out.println() to print lines.
diff --git a/fortran95.html.markdown b/fortran95.html.markdown
index 8479fef8..c256bb38 100644
--- a/fortran95.html.markdown
+++ b/fortran95.html.markdown
@@ -6,7 +6,7 @@ filename: learnfortran.f95
 ---
 
 Fortran is one of the oldest computer languages. It was developed in the 1950s 
-by IBM for numeric calculations (Fortran is an abreviation of "Formula 
+by IBM for numeric calculations (Fortran is an abbreviation of "Formula 
 Translation"). Despite its age, it is still used for high-performance computing
 such as weather prediction. However, the language has changed considerably over
 the years, although mostly maintaining backwards compatibility; well known
@@ -242,7 +242,7 @@ program example   !declare a program called example.
     close(12)
 
     ! There are more features available than discussed here and alternative 
-    ! variants due to backwards compatability with older Fortran versions.  
+    ! variants due to backwards compatibility with older Fortran versions.
     
     
     ! Built-in Functions
diff --git a/fr-fr/scala.html.markdown b/fr-fr/scala.html.markdown
index c6d06361..c6a61745 100644
--- a/fr-fr/scala.html.markdown
+++ b/fr-fr/scala.html.markdown
@@ -276,7 +276,7 @@ i    // Montre la valeur de i. Notez que while est une boucle au sens classique.
 i = 0
 // La boucle do while
 do {
-  println("x is still less then 10");
+  println("x is still less than 10");
   i += 1
 } while (i < 10)
 
diff --git a/git.html.markdown b/git.html.markdown
index 1cd2578e..088c109f 100644
--- a/git.html.markdown
+++ b/git.html.markdown
@@ -432,7 +432,7 @@ Stashing takes the dirty state of your working directory and saves it on a
 stack of unfinished changes that you can reapply at any time.
 
 Let's say you've been doing some work in your git repo, but you want to pull
-from the remote. Since you have dirty (uncommited) changes to some files, you
+from the remote. Since you have dirty (uncommitted) changes to some files, you
 are not able to run `git pull`. Instead, you can run `git stash` to save your
 changes onto a stack!
 
@@ -521,7 +521,7 @@ $ git reset --hard
 $ git reset 31f2bb1
 
 # Moves the current branch tip backward to the specified commit
-# and makes the working dir match (deletes uncommited changes and all commits
+# and makes the working dir match (deletes uncommitted changes and all commits
 # after the specified commit).
 $ git reset --hard 31f2bb1
 ```
diff --git a/hack.html.markdown b/hack.html.markdown
index b3d19f8e..fb6af8e1 100644
--- a/hack.html.markdown
+++ b/hack.html.markdown
@@ -257,7 +257,7 @@ class InvalidFooSubclass extends ConsistentFoo
         // ...
     }
 
-    // Using the __Override annotation on a non-overriden method will cause a
+    // Using the __Override annotation on a non-overridden method will cause a
     // type checker error:
     //
     //  "InvalidFooSubclass::otherMethod() is marked as override; no non-private
@@ -299,7 +299,7 @@ $cat instanceof KittenInterface === true; // True
 ## More Information
 
 Visit the [Hack language reference](http://docs.hhvm.com/manual/en/hacklangref.php)
-for detailed explainations of the features Hack adds to PHP, or the [official Hack website](http://hacklang.org/)
+for detailed explanations of the features Hack adds to PHP, or the [official Hack website](http://hacklang.org/)
 for more general information.
 
 Visit the [official HHVM website](http://hhvm.com/) for HHVM installation instructions.
diff --git a/haml.html.markdown b/haml.html.markdown
index 0948e9ef..5dd4cb6d 100644
--- a/haml.html.markdown
+++ b/haml.html.markdown
@@ -36,7 +36,7 @@ $ haml input_file.haml output_file.html
   To write a multi line comment, indent your commented code to be
   wrapped by the forward slash
 
--# This is a silent comment, which means it wont be rendered into the doc at all
+-# This is a silent comment, which means it won't be rendered into the doc at all
 
 
 / -------------------------------------------
diff --git a/haxe.html.markdown b/haxe.html.markdown
index 03b3099e..e811031e 100644
--- a/haxe.html.markdown
+++ b/haxe.html.markdown
@@ -466,7 +466,7 @@ class LearnHaxe3{
            The untyped keyword operates on entire *blocks* of code, skipping
            any type checks that might be otherwise required. This keyword should
            be used very sparingly, such as in limited conditionally-compiled
-           situations where type checking is a hinderance.
+           situations where type checking is a hindrance.
 
            In general, skipping type checks is *not* recommended.  Use the
            enum, inheritance, or structural type models in order to help ensure
diff --git a/hy.html.markdown b/hy.html.markdown
index 79c16c23..1287095f 100644
--- a/hy.html.markdown
+++ b/hy.html.markdown
@@ -102,7 +102,7 @@ True ; => True
 (apply something-fancy ["My horse" "amazing"] { "mane" "spectacular" })
 
 ; anonymous functions are created using `fn' or `lambda' constructs
-; which are similiar to `defn'
+; which are similar to `defn'
 (map (fn [x] (* x x)) [1 2 3 4]) ;=> [1 4 9 16]
 
 ;; Sequence operations
diff --git a/ja-jp/php-jp.html.markdown b/ja-jp/php-jp.html.markdown
index 112916f4..a02ae56a 100644
--- a/ja-jp/php-jp.html.markdown
+++ b/ja-jp/php-jp.html.markdown
@@ -119,7 +119,7 @@ echo 'Multiple', 'Parameters', 'Valid';
 define("FOO",     "something");
 
 // 定義した名前をそのまま($はつけずに)使用することで、定数にアクセスできます
-// access to a constant is possible by direct using the choosen name
+// access to a constant is possible by direct using the chosen name
 echo 'This outputs '.FOO;
 
 
diff --git a/java.html.markdown b/java.html.markdown
index a27a68ca..fa1ff3d1 100644
--- a/java.html.markdown
+++ b/java.html.markdown
@@ -57,7 +57,7 @@ public class LearnJava {
     ///////////////////////////////////////
 
         /*
-        * Ouput
+        * Output
         */
 
         // Use System.out.println() to print lines.
diff --git a/kdb+.html.markdown b/kdb+.html.markdown
index 099d1529..5ae86a4f 100644
--- a/kdb+.html.markdown
+++ b/kdb+.html.markdown
@@ -6,7 +6,7 @@ contributors:
 filename: learnkdb.q
 ---
 
-The q langauge and its database component kdb+ were developed by Arthur Whitney
+The q language and its database component kdb+ were developed by Arthur Whitney
 and released by Kx systems in 2003. q is a descendant of APL and as such is
 very terse and a little strange looking for anyone from a "C heritage" language
 background. Its expressiveness and vector oriented nature make it well suited
@@ -301,7 +301,7 @@ l:1+til 9 / til is a useful shortcut for generating ranges
 -5#l / => 5 6 7 8 9
 / drop the last 5
 -5_l / => 1 2 3 4
-/ find the first occurance of 4
+/ find the first occurrence of 4
 l?4 / => 3
 l[3] / => 4
 
@@ -316,7 +316,7 @@ key d / => `a`b`c
 / and value the second
 value d / => 1 2 3
 
-/ Indexing is indentical to lists
+/ Indexing is identical to lists
 / with the first list as a key instead of the position
 d[`a] / => 1
 d[`b] / => 2
@@ -406,7 +406,7 @@ k!t
 / We can also use this shortcut for defining keyed tables
 kt:([id:1 2 3]c1:1 2 3;c2:4 5 6;c3:7 8 9)
 
-/ Records can then be retreived based on this key
+/ Records can then be retrieved based on this key
 kt[1]
 / => c1| 1
 / => c2| 4
@@ -428,7 +428,7 @@ kt[`id!1]
 f:{x+x}
 f[2] / => 4
 
-/ Functions can be annonymous and called at point of definition
+/ Functions can be anonymous and called at point of definition
 {x+x}[2] / => 4
 
 / By default the last expression is returned
@@ -440,7 +440,7 @@ f[2] / => 4
 
 / Function arguments can be specified explicitly (separated by ;)
 {[arg1;arg2] arg1+arg2}[1;2] / => 3
-/ or if ommited will default to x, y and z
+/ or if omitted will default to x, y and z
 {x+y+z}[1;2;3] / => 6
 
 / Built in functions are no different, and can be called the same way (with [])
@@ -472,7 +472,7 @@ a / => 1
 / Functions cannot see nested scopes (only local and global)
 {local:1;{:local}[]}[] / throws error as local is not defined in inner function
 
-/ A function can have one or more of it's arguments fixed (projection)
+/ A function can have one or more of its arguments fixed (projection)
 f:+[4]
 f[4] / => 8
 f[5] / => 9
@@ -483,7 +483,7 @@ f[6] / => 10
 //////////     q-sql      //////////
 ////////////////////////////////////
 
-/ q has it's own syntax for manipulating tables, similar to standard SQL
+/ q has its own syntax for manipulating tables, similar to standard SQL
 / This contains the usual suspects of select, insert, update etc.
 / and some new functionality not typically available
 / q-sql has two significant differences (other than syntax) to normal SQL:
@@ -682,7 +682,7 @@ aj[`time`sym;trades;quotes]
 / where possible functionality should be vectorized (i.e. operations on lists)
 / adverbs supplement this, modifying the behaviour of functions
 / and providing loop type functionality when required
-/ (in q functions are sometimes refered to as verbs, hence adverbs)
+/ (in q functions are sometimes referred to as verbs, hence adverbs)
 / the "each" adverb modifies a function to treat a list as individual variables
 first each (1 2 3;4 5 6;7 8 9)
 / => 1 4 7
@@ -762,7 +762,7 @@ select from splayed / (the columns are read from disk on request)
 / kdb+ is typically used for data capture and analysis.
 / This involves using an architecture with multiple processes
 / working together.  kdb+ frameworks are available to streamline the setup
-/ and configuration of this architecuture and add additional functionality
+/ and configuration of this architecture and add additional functionality
 / such as disaster recovery, logging, access, load balancing etc.
 / https://github.com/AquaQAnalytics/TorQ
 ```
diff --git a/matlab.html.markdown b/matlab.html.markdown
index 86b116c6..6dc9f697 100644
--- a/matlab.html.markdown
+++ b/matlab.html.markdown
@@ -353,7 +353,7 @@ double_input(6) % ans = 12
 % anonymous function. Useful when quickly defining a function to pass to
 % another function (eg. plot with fplot, evaluate an indefinite integral
 % with quad, find roots with fzero, or find minimum with fminsearch).
-% Example that returns the square of it's input, assigned to the handle sqr:
+% Example that returns the square of its input, assigned to the handle sqr:
 sqr = @(x) x.^2;
 sqr(10) % ans = 100
 doc function_handle % find out more
diff --git a/nim.html.markdown b/nim.html.markdown
index 5d00304d..07674532 100644
--- a/nim.html.markdown
+++ b/nim.html.markdown
@@ -76,7 +76,7 @@ let myDrink = drinks[2]
 # static typing powerful and useful.
 
 type
-  Name = string # A type alias gives you a new type that is interchangable
+  Name = string # A type alias gives you a new type that is interchangeable
   Age = int     # with the old type but is more descriptive.
   Person = tuple[name: Name, age: Age] # Define data structures too.
   AnotherSyntax = tuple
@@ -109,7 +109,7 @@ when compileBadCode:
 
 type
   Color = enum cRed, cBlue, cGreen
-  Direction = enum # Alternative formating
+  Direction = enum # Alternative formatting
     dNorth
     dWest
     dEast
diff --git a/objective-c.html.markdown b/objective-c.html.markdown
index 2b599378..04c4e529 100644
--- a/objective-c.html.markdown
+++ b/objective-c.html.markdown
@@ -786,7 +786,7 @@ MyClass *newVar = [classVar retain]; // If classVar is released, object is still
 // Automatic Reference Counting (ARC)
 // Because memory management can be a pain, Xcode 4.2 and iOS 4 introduced Automatic Reference Counting (ARC).
 // ARC is a compiler feature that inserts retain, release, and autorelease automatically for you, so when using ARC,
-// you must not use retain, relase, or autorelease
+// you must not use retain, release, or autorelease
 MyClass *arcMyClass = [[MyClass alloc] init];
 // ... code using arcMyClass
 // Without ARC, you will need to call: [arcMyClass release] after you're done using arcMyClass. But with ARC,
diff --git a/perl6.html.markdown b/perl6.html.markdown
index 44960347..18326338 100644
--- a/perl6.html.markdown
+++ b/perl6.html.markdown
@@ -447,7 +447,7 @@ False ~~ True; # True
 # http://perlcabal.org/syn/S03.html#Smart_matching
 
 # You also, of course, have `<`, `<=`, `>`, `>=`.
-# Their string equivalent are also avaiable : `lt`, `le`, `gt`, `ge`.
+# Their string equivalent are also available : `lt`, `le`, `gt`, `ge`.
 3 > 4;
 
 ## * Range constructors
@@ -618,7 +618,7 @@ my @arrayplus3 = map(*+3, @array); # `*+3` is the same as `{ $_ + 3 }`
 my @arrayplus3 = map(*+*+3, @array); # Same as `-> $a, $b { $a + $b + 3 }`
                                      # also `sub ($a, $b) { $a + $b + 3 }`
 say (*/2)(4); #=> 2
-              # Immediatly execute the function Whatever created.
+              # Immediately execute the function Whatever created.
 say ((*+3)/5)(5); #=> 1.6
                   # works even in parens !
 
@@ -750,7 +750,7 @@ sub call_say_dyn {
   my $*dyn_scoped_1 = 25; # Defines $*dyn_scoped_1 only for this sub.
   $*dyn_scoped_2 = 100; # Will change the value of the file scoped variable.
   say_dyn(); #=> 25 100 $*dyn_scoped 1 and 2 will be looked for in the call.
-             # It uses he value of $*dyn_scoped_1 from inside this sub's lexical
+             # It uses the value of $*dyn_scoped_1 from inside this sub's lexical
              # scope even though the blocks aren't nested (they're call-nested).
 }
 say_dyn(); #=> 1 10
@@ -816,7 +816,7 @@ $class-obj.other-attrib = 10; # This, however, works, because the public
 #  Perl 6 also has inheritance (along with multiple inheritance)
 #  While `method`'s are inherited, `submethod`'s are not.
 #  Submethods are useful for object construction and destruction tasks,
-#  such as BUILD, or methods that must be overriden by subtypes.
+#  such as BUILD, or methods that must be overridden by subtypes.
 #  We will learn about BUILD later on.
 
 class Parent {
@@ -840,7 +840,7 @@ $Richard.talk; #=> "Hi, my name is Richard"
 # # $Richard is able to access the submethod, he knows how to say his name.
 
 my Child $Madison .= new(age => 1, name => 'Madison');
-$Madison.talk; # prints "Goo goo ga ga" due to the overrided method.
+$Madison.talk; # prints "Goo goo ga ga" due to the overridden method.
 # $Madison.favorite-color does not work since it is not inherited
 
 # When you use `my T $var`, `$var` starts off with `T` itself in it,
@@ -1054,7 +1054,7 @@ say why-not[^5]; #=> 5 15 25 35 45
 
 ## * `state` (happens at run time, but only once)
 # State variables are only initialized one time
-# (they exist in other langages such as C as `static`)
+# (they exist in other languages such as C as `static`)
 sub fixed-rand {
   state $val = rand;
   say $val;
@@ -1105,7 +1105,7 @@ PRE {
     say "If this block doesn't return a truthy value,
         an exception of type X::Phaser::PrePost is thrown.";
 }
-# exemple:
+# example:
 for 0..2 {
     PRE { $_ > 1 } # This is going to blow up with "Precondition failed"
 }
@@ -1204,7 +1204,7 @@ say (1, 10, (20, 10) ).flat; #> (1 10 20 10) Now the iterable is flat
 
 # - `lazy` - Defer actual evaluation until value is fetched (forces lazy context)
 my @lazy-array = (1..100).lazy;
-say @lazy-array.is-lazy; #> True # Check for lazyness with the `is-lazy` method.
+say @lazy-array.is-lazy; #> True # Check for laziness with the `is-lazy` method.
 say @lazy-array; #> [...] List has not been iterated on!
 my @lazy-array { .print }; # This works and will only do as much work as is
 # needed.
@@ -1599,7 +1599,7 @@ so 'ayc' ~~ / a [ b | y ] c /; # `True`. Obviously enough ...
 # To decide which part is the "longest", it first splits the regex in two parts:
 # The "declarative prefix" (the part that can be statically analyzed)
 #  and the procedural parts.
-# Declarative prefixes include alternations (`|`), conjuctions (`&`),
+# Declarative prefixes include alternations (`|`), conjunctions (`&`),
 #  sub-rule calls (not yet introduced), literals, characters classes and quantifiers.
 # The latter include everything else: back-references, code assertions,
 #  and other things that can't traditionnaly be represented by normal regexps.
@@ -1755,10 +1755,10 @@ If you want to go further, you can:
  This will give you a dropdown menu of all the pages referencing your search
  term (Much better than using Google to find Perl 6 documents!)
  - Read the [Perl 6 Advent Calendar](http://perl6advent.wordpress.com/). This
- is a great source of Perl 6 snippets and explainations.  If the docs don't
+ is a great source of Perl 6 snippets and explanations.  If the docs don't
  describe something well enough, you may find more detailed information here.
  This information may be a bit older but there are many great examples and
- explainations.  Posts stopped at the end of 2015 when the language was declared
+ explanations.  Posts stopped at the end of 2015 when the language was declared
  stable and Perl 6.c was released.
  - Come along on `#perl6` at `irc.freenode.net`. The folks here are always helpful.
  - Check the [source of Perl 6's functions and classes](https://github.com/rakudo/rakudo/tree/nom/src/core). Rakudo is mainly written in Perl 6 (with a lot of NQP, "Not Quite Perl", a Perl 6 subset easier to implement and optimize).
diff --git a/php.html.markdown b/php.html.markdown
index ac9b45a8..f82cea7d 100644
--- a/php.html.markdown
+++ b/php.html.markdown
@@ -122,9 +122,9 @@ echo 'Multiple', 'Parameters', 'Valid';  // Returns 'MultipleParametersValid'
 // followed by any number of letters, numbers, or underscores.
 define("FOO", "something");
 
-// access to a constant is possible by calling the choosen name without a $
+// access to a constant is possible by calling the chosen name without a $
 echo FOO; // Returns 'something'
-echo 'This outputs ' . FOO;  // Returns 'This ouputs something'
+echo 'This outputs ' . FOO;  // Returns 'This outputs something'
 
 
 
@@ -837,7 +837,7 @@ try {
     // Handle exception
 }
 
-// When using try catch blocks in a namespaced enviroment use the following
+// When using try catch blocks in a namespaced environment use the following
 
 try {
     // Do something
@@ -854,7 +854,7 @@ try {
     $condition = true;
 
     if ($condition) {
-        throw new MyException('Something just happend');
+        throw new MyException('Something just happened');
     }
 
 } catch (MyException $e) {
diff --git a/pt-br/c-pt.html.markdown b/pt-br/c-pt.html.markdown
index 0af553c8..6e7aa8c2 100644
--- a/pt-br/c-pt.html.markdown
+++ b/pt-br/c-pt.html.markdown
@@ -647,7 +647,7 @@ Se você tem uma pergunta, leia [compl.lang.c Frequently Asked Questions](http:/
 
 É importante usar espaços e indentação adequadamente e ser consistente com seu estilo de código em geral.
 Código legível é melhor que código 'esperto' e rápido. Para adotar um estilo de código bom e são, veja
-[Linux kernel coding stlye](https://www.kernel.org/doc/Documentation/CodingStyle).
+[Linux kernel coding style](https://www.kernel.org/doc/Documentation/CodingStyle).
 
 Além disso, Google é teu amigo.
 [1] http://stackoverflow.com/questions/119123/why-isnt-sizeof-for-a-struct-equal-to-the-sum-of-sizeof-of-each-member
diff --git a/pythonstatcomp.html.markdown b/pythonstatcomp.html.markdown
index 8ee3aa64..79bbcd8d 100644
--- a/pythonstatcomp.html.markdown
+++ b/pythonstatcomp.html.markdown
@@ -104,7 +104,7 @@ import matplotlib as mpl
 import matplotlib.pyplot as plt
 %matplotlib inline
 
-# To do data vizualization in Python, use matplotlib
+# To do data visualization in Python, use matplotlib
 
 plt.hist(pets.age);
 
diff --git a/qt.html.markdown b/qt.html.markdown
index a9c855a6..64e36e2e 100644
--- a/qt.html.markdown
+++ b/qt.html.markdown
@@ -14,7 +14,7 @@ lang: en
 
 ```c++
 /*
- * Let's start clasically
+ * Let's start classically
  */
 
 // all headers from Qt framework start with capital letter 'Q'
@@ -79,7 +79,7 @@ int main(int argc, char *argv[]) {
 
 Notice that *QObject::connect* part. This method is used to connect *SIGNALS* of one objects to *SLOTS* of another.
 
-**Signals** are being emited when certain things happen with objects, like *pressed* signal is emited when user presses on QPushButton object.
+**Signals** are being emitted when certain things happen with objects, like *pressed* signal is emitted when user presses on QPushButton object.
 
 **Slots** are *actions* that might be performed in response to received signals.
 
diff --git a/r.html.markdown b/r.html.markdown
index 8539b10e..7a94ba05 100644
--- a/r.html.markdown
+++ b/r.html.markdown
@@ -192,7 +192,7 @@ class(-Inf)	# "numeric"
 2.0 * 2L  # 4       # numeric times integer gives numeric
 3L / 4    # 0.75    # integer over numeric gives numeric
 3 %% 2	  # 1       # the remainder of two numerics is another numeric
-# Illegal arithmetic yeilds you a "not-a-number":
+# Illegal arithmetic yields you a "not-a-number":
 0 / 0 # NaN
 class(NaN) # "numeric"
 # You can do arithmetic on two vectors with length greater than 1,
@@ -662,7 +662,7 @@ require(plyr)
 #########################
 
 # "pets.csv" is a file on the internet
-# (but it could just as easily be be a file on your own computer)
+# (but it could just as easily be a file on your own computer)
 pets <- read.csv("http://learnxinyminutes.com/docs/pets.csv")
 pets
 head(pets, 2) # first two rows
diff --git a/red.html.markdown b/red.html.markdown
index 5f6ffc86..3575032f 100644
--- a/red.html.markdown
+++ b/red.html.markdown
@@ -51,7 +51,7 @@ comment {
 ; no need to restrict this to a 'main' function.
 
 ; Valid variable names start with a letter and can contain numbers,
-; variables containing only capital A thru F and numbers and ending with 'h'
+; variables containing only capital A through F and numbers and ending with 'h'
 ; are forbidden, because that is how hexadecimal numbers are expressed in Red
 ; and Red/System.
 
diff --git a/ru-ru/c-ru.html.markdown b/ru-ru/c-ru.html.markdown
index 71e41ee3..44e7ad3b 100644
--- a/ru-ru/c-ru.html.markdown
+++ b/ru-ru/c-ru.html.markdown
@@ -477,7 +477,7 @@ void str_reverse_through_pointer(char *str_in) {
 
 Очень важно использовать правильные отступы и ставить пробелы в нужных местах.
 Читаемый код лучше чем красивый или быстрый код.
-Чтобы научиться писать хороший код, почитайте [Linux kernel coding stlye](https://www.kernel.org/doc/Documentation/CodingStyle).
+Чтобы научиться писать хороший код, почитайте [Linux kernel coding style](https://www.kernel.org/doc/Documentation/CodingStyle).
 
 Также не забывайте, что [Google](http://google.com) и [Яндекс](http://yandex.ru) – ваши хорошие друзья.
 
diff --git a/ru-ru/objective-c-ru.html.markdown b/ru-ru/objective-c-ru.html.markdown
index d60db1d8..3baa15f8 100644
--- a/ru-ru/objective-c-ru.html.markdown
+++ b/ru-ru/objective-c-ru.html.markdown
@@ -781,7 +781,7 @@ MyClass *newVar = [classVar retain]; // Если classVar освободится
 // автоматический подсчет ссылок (ARC).
 // ARC - это особенность компилятора, который помещает "retain", "release"
 // и "autorelease" автоматически за вас тогда, когда используется ARC,
-// вам не нужно больше обращаться к "retain", "relase" или "autorelease"
+// вам не нужно больше обращаться к "retain", "release" или "autorelease"
 MyClass *arcMyClass = [[MyClass alloc] init];
 // ... код, использующий объект arcMyClass
 // Без ARC, вам нужно было бы вызвать: [arcMyClass release] после того, как вы
diff --git a/ru-ru/php-ru.html.markdown b/ru-ru/php-ru.html.markdown
index 2512201b..014ff5d0 100644
--- a/ru-ru/php-ru.html.markdown
+++ b/ru-ru/php-ru.html.markdown
@@ -128,7 +128,7 @@ define("FOO", "something");
 
 // Доступ к константе возможен через прямое указание её имени без знака $
 echo FOO; // печатает 'something'
-echo 'This outputs ' . FOO; // печатает 'This ouputs something'
+echo 'This outputs ' . FOO; // печатает 'This outputs something'
 
 /********************************
  * Массивы
diff --git a/ruby-ecosystem.html.markdown b/ruby-ecosystem.html.markdown
index 1fbcc752..50eedcd0 100644
--- a/ruby-ecosystem.html.markdown
+++ b/ruby-ecosystem.html.markdown
@@ -88,7 +88,7 @@ implementation.
   to have stopped since Microsoft pulled their support.
 
 Ruby implementations may have their own release version numbers, but they always
-target a specific version of MRI for compatability. Many implementations have
+target a specific version of MRI for compatibility. Many implementations have
 the ability to enter different modes (for example, 1.8 or 1.9 mode) to specify
 which MRI version to target.
 
diff --git a/shutit.html.markdown b/shutit.html.markdown
index d16290b3..67d7a4b5 100644
--- a/shutit.html.markdown
+++ b/shutit.html.markdown
@@ -10,7 +10,7 @@ filename: learnshutit.html
 
 ShutIt is an shell automation framework designed to be easy to use.
 
-It is a wrapper around a python-based expect clone (pexpect).
+It is a wrapper around a Python-based expect clone (pexpect).
 
 You can look at it as 'expect without the pain'.
 
@@ -167,8 +167,8 @@ session2.logout()
 Here you use the 'send\_and\_get\_output' method to retrieve the output of the
 capacity command (df).
 
-There are much more elegant ways to do the above (eg have a dictionary of the
-servers to iterate over), but it's up to you how clever you need the python to
+There are much more elegant ways to do the above (e.g. have a dictionary of the
+servers to iterate over), but it's up to you how clever you need the Python to
 be.
 
 
@@ -300,7 +300,7 @@ over a minute to complete (using the 'wait' method).
 
 Again, this is trivial, but imagine you have hundreds of servers to manage like
 this and you can see the power it can bring in a few lines of code and one
-python import.
+Python import.
 
 
 ## Learn More
diff --git a/smalltalk.html.markdown b/smalltalk.html.markdown
index cc7ab84c..66022d95 100644
--- a/smalltalk.html.markdown
+++ b/smalltalk.html.markdown
@@ -907,7 +907,7 @@ b := String isWords.                                        true if index instan
 Object withAllSubclasses size.                              "get total number of class entries"
 ```
 
-## Debuging:
+## Debugging:
 ```
 | a b x |
 x yourself.                                                 "returns receiver"
diff --git a/solidity.html.markdown b/solidity.html.markdown
index 602d74f0..a501befd 100644
--- a/solidity.html.markdown
+++ b/solidity.html.markdown
@@ -188,7 +188,7 @@ string n = "hello"; // stored in UTF8, note double quotes, not single
 // string utility functions to be added in future
 // prefer bytes32/bytes, as UTF8 uses more storage
 
-// Type inferrence
+// Type inference
 // var does inferred typing based on first assignment,
 // can't be used in functions parameters
 var a = true;
@@ -484,7 +484,7 @@ contract MyContract is abc, def("a custom argument to def") {
     function z() {
         if (msg.sender == owner) {
             def.z(); // call overridden function from def
-            super.z(); // call immediate parent overriden function
+            super.z(); // call immediate parent overridden function
         }
     }
 }
@@ -804,7 +804,7 @@ someContractAddress.callcode('function_name');
 // else should be placed on own line
 
 
-// 14. NATSPEC COMENTS
+// 14. NATSPEC COMMENTS
 // used for documentation, commenting, and external UIs
 
 // Contract natspec - always above contract definition
diff --git a/standard-ml.html.markdown b/standard-ml.html.markdown
index c286366b..9ebf345b 100644
--- a/standard-ml.html.markdown
+++ b/standard-ml.html.markdown
@@ -395,7 +395,7 @@ fun failing_function []    = raise Empty  (* used for empty lists *)
   | failing_function xs    = raise Fail "This list is too long!"
 
 (* We can pattern match in 'handle' to make sure
-   a specfic exception was raised, or grab the message *)
+   a specific exception was raised, or grab the message *)
 val err_msg = failing_function [1,2] handle Fail _ => "Fail was raised"
                                           | Domain => "Domain was raised"
                                           | Empty  => "Empty was raised"
diff --git a/swift.html.markdown b/swift.html.markdown
index c17510b6..60915d72 100644
--- a/swift.html.markdown
+++ b/swift.html.markdown
@@ -281,7 +281,7 @@ testGuard()
 
 // Variadic Args
 func setup(numbers: Int...) {
-    // its an array
+    // it's an array
     let _ = numbers[0]
     let _ = numbers.count
 }
diff --git a/tcl.html.markdown b/tcl.html.markdown
index 1f4ca63b..8e3158b0 100644
--- a/tcl.html.markdown
+++ b/tcl.html.markdown
@@ -49,7 +49,7 @@ discipline of exposing all programmatic functionality as routines, including
 things like looping and mathematical operations that are usually baked into the
 syntax of other languages, allows it to fade into the background of whatever
 domain-specific functionality a project needs. Its syntax, which is even
-lighter that that of Lisp, just gets out of the way.
+lighter than that of Lisp, just gets out of the way.
 
 
 
@@ -75,7 +75,7 @@ lighter that that of Lisp, just gets out of the way.
 ## 2. Syntax
 ###############################################################################
 
-# A script is made up of commands delimited by newlines or semiclons.  Each
+# A script is made up of commands delimited by newlines or semicolons.  Each
 # command is a call to a routine.  The first word is the name of a routine to
 # call, and subsequent words are arguments to the routine.  Words are delimited
 # by whitespace.  Since each argument is a word in the command it is already a
@@ -99,7 +99,7 @@ set greeting $part1$part2[set part3]
 
 
 # An embedded script may be composed of multiple commands, the last of which provides
-# the result for the substtution:
+# the result for the substitution:
 set greeting $greeting[
     incr i
     incr i
@@ -377,7 +377,7 @@ set amount [lindex $amounts 1]
 set inventory {"item 1" item\ 2 {item 3}}
 
 
-# It's generally a better idea to use list routines when modifing lists:
+# It's generally a better idea to use list routines when modifying lists:
 lappend inventory {item 1} {item 2} {item 3}
 
 
@@ -517,7 +517,7 @@ proc while {condition script} {
 # and then calls that routine.  "yield" suspends evaluation in that stack and
 # returns control to the calling stack:
 proc countdown count {
-    # send something back to the creater of the coroutine, effectively pausing
+    # send something back to the creator of the coroutine, effectively pausing
     # this call stack for the time being.
     yield [info coroutine]
 
diff --git a/tcsh.html.markdown b/tcsh.html.markdown
index a95a84b0..70f1e52d 100644
--- a/tcsh.html.markdown
+++ b/tcsh.html.markdown
@@ -592,7 +592,7 @@ while ( $#lst )
 	shift lst
 end
 echo 'options =' $options
-echo 'paramaters =' $params
+echo 'parameters =' $params
 
 #### REPEAT
 # Syntax: repeat count command
diff --git a/tr-tr/c-tr.html.markdown b/tr-tr/c-tr.html.markdown
index 33544765..6042a609 100644
--- a/tr-tr/c-tr.html.markdown
+++ b/tr-tr/c-tr.html.markdown
@@ -481,7 +481,7 @@ Diğer bir iyi kaynak ise [Learn C the hard way](http://c.learncodethehardway.or
 
 It's very important to use proper spacing, indentation and to be consistent with your coding style in general.
 Readable code is better than clever code and fast code. For a good, sane coding style to adopt, see the
-[Linux kernel coding stlye](https://www.kernel.org/doc/Documentation/CodingStyle).
+[Linux kernel coding style](https://www.kernel.org/doc/Documentation/CodingStyle).
 
 Diğer taraftan google sizin için bir arkadaş olabilir.
 
diff --git a/typescript.html.markdown b/typescript.html.markdown
index ef37182d..44fd791a 100644
--- a/typescript.html.markdown
+++ b/typescript.html.markdown
@@ -50,7 +50,7 @@ function bigHorribleAlert(): void {
 // Functions are first class citizens, support the lambda "fat arrow" syntax and
 // use type inference
 
-// The following are equivalent, the same signature will be infered by the
+// The following are equivalent, the same signature will be inferred by the
 // compiler, and same JavaScript will be emitted
 let f1 = function (i: number): number { return i * i; }
 // Return type inferred
diff --git a/vim.html.markdown b/vim.html.markdown
index 70f43be1..7723136f 100644
--- a/vim.html.markdown
+++ b/vim.html.markdown
@@ -40,9 +40,9 @@ specific points in the file, and for fast editing.
 
     # Searching in the text
 
-    /word            # Highlights all occurences of word after cursor
-    ?word            # Highlights all occurences of word before cursor
-    n                # Moves cursor to next occurence of word after search
+    /word            # Highlights all occurrences of word after cursor
+    ?word            # Highlights all occurrences of word before cursor
+    n                # Moves cursor to next occurrence of word after search
     N                # Moves cursor to previous occerence of word
 
     :%s/foo/bar/g    # Change 'foo' to 'bar' on every line in the file
diff --git a/visualbasic.html.markdown b/visualbasic.html.markdown
index f081b907..cbeb36b5 100644
--- a/visualbasic.html.markdown
+++ b/visualbasic.html.markdown
@@ -12,7 +12,7 @@ Module Module1
         'A Quick Overview of Visual Basic Console Applications before we dive
         'in to the deep end.
         'Apostrophe starts comments.
-        'To Navigate this tutorial within the Visual Basic Complier, I've put
+        'To Navigate this tutorial within the Visual Basic Compiler, I've put
         'together a navigation system.
         'This navigation system is explained however as we go deeper into this
         'tutorial, you'll understand what it all means.
diff --git a/yaml.html.markdown b/yaml.html.markdown
index 95adbd83..3b32a069 100644
--- a/yaml.html.markdown
+++ b/yaml.html.markdown
@@ -27,7 +27,7 @@ another_key: Another value goes here.
 a_number_value: 100
 scientific_notation: 1e+12
 # The number 1 will be interpreted as a number, not a boolean. if you want
-# it to be intepreted as a boolean, use true
+# it to be interpreted as a boolean, use true
 boolean: true
 null_value: null
 key with spaces: value
@@ -132,7 +132,7 @@ python_complex_number: !!python/complex 1+2j
 # We can also use yaml complex keys with language specific tags
 ? !!python/tuple [5, 7]
 : Fifty Seven
-# Would be {(5, 7): 'Fifty Seven'} in python
+# Would be {(5, 7): 'Fifty Seven'} in Python
 
 ####################
 # EXTRA YAML TYPES #
diff --git a/zh-cn/visualbasic-cn.html.markdown b/zh-cn/visualbasic-cn.html.markdown
index 59f18fe2..8bdfabc6 100644
--- a/zh-cn/visualbasic-cn.html.markdown
+++ b/zh-cn/visualbasic-cn.html.markdown
@@ -77,7 +77,7 @@ Module Module1
     ' 使用 private subs 声明函数。 
     Private Sub HelloWorldOutput()
         ' 程序名
-        Console.Title = "Hello World Ouput | Learn X in Y Minutes"
+        Console.Title = "Hello World Output | Learn X in Y Minutes"
         ' 使用 Console.Write("") 或者 Console.WriteLine("") 来输出文本到屏幕上
         ' 对应的 Console.Read() 或 Console.Readline() 用来读取键盘输入
         Console.WriteLine("Hello World")