diff --git a/c/Centura.centura b/c/Centura.centura
index aa5a2b15..bca9f7fb 100644
--- a/c/Centura.centura
+++ b/c/Centura.centura
@@ -7,4 +7,4 @@ Parameters
 Static Variables
 Local variables
 Actions
- Call SalMessageBox( "Hello World",'Message',MB_Ok)
+ Call SalMessageBox( 'Hello World','Message',MB_Ok)
diff --git a/d/DogeScript.djs b/d/DogeScript.djs
index d66229f2..b20f3cde 100644
--- a/d/DogeScript.djs
+++ b/d/DogeScript.djs
@@ -1,3 +1,3 @@
 shh such hello dogescript very next-gen wow difficulty
 
-plz console.loge with "Hello World"
+plz console.loge with 'Hello World'
diff --git a/g/Google Apps Script.gs b/g/Google Apps Script.gs
index e55204ea..dd15942c 100644
--- a/g/Google Apps Script.gs	
+++ b/g/Google Apps Script.gs	
@@ -1,3 +1,3 @@
 function helloWorld() {
-  Logger.log("Hello World");
+  Logger.log('Hello World');
 }
diff --git a/h/Hack.hh b/h/Hack.hh
index 7851c79b..d9b5532c 100644
--- a/h/Hack.hh
+++ b/h/Hack.hh
@@ -1,2 +1,2 @@
 <?hh 
-echo "Hello World";
+echo 'Hello World';
diff --git a/h/Hubot.coffee b/h/Hubot.coffee
index f8da42c5..ebba60af 100644
--- a/h/Hubot.coffee
+++ b/h/Hubot.coffee
@@ -1,3 +1,3 @@
 module.exports = (robot) ->
   robot.respond /hello/i, (msg) ->
-    msg.send "Hello World"
+    msg.send 'Hello World'
diff --git a/k/Karel.kl b/k/Karel.kl
index 960a22f7..20afe957 100644
--- a/k/Karel.kl
+++ b/k/Karel.kl
@@ -1,4 +1,4 @@
 PROGRAM hello_world
 BEGIN
-  WRITE("Hello World", CR)
+  WRITE('Hello World', CR)
 END hello_world
diff --git a/p/PLSQL.sql b/p/PLSQL.sql
index dc214380..65235a39 100644
--- a/p/PLSQL.sql
+++ b/p/PLSQL.sql
@@ -1,4 +1,4 @@
 begin
-  dbms_output.put_line("Hello World");
+  dbms_output.put_line('Hello World');
 end;
 /
diff --git a/p/PiCat.pi b/p/PiCat.pi
index 2035452f..4491f89d 100644
--- a/p/PiCat.pi
+++ b/p/PiCat.pi
@@ -1,2 +1,2 @@
 main =>
-  println("Hello World").
+  println('Hello World').