diff --git a/resources/js/ext.uls.compactlinks.js b/resources/js/ext.uls.compactlinks.js
index 952da1d1..20f02d00 100644
--- a/resources/js/ext.uls.compactlinks.js
+++ b/resources/js/ext.uls.compactlinks.js
@@ -210,12 +210,14 @@
 	 * @param {jQuery} $trigger Element to use as trigger.
 	 */
 	CompactInterlanguageList.prototype.createSelector = function ( $trigger ) {
-		var languages = Object.keys( this.interlanguageList ),
+		var languages,
 			self = this,
 			ulsLanguageList = {};
 
-		languages.forEach( function ( languageCode ) {
-			ulsLanguageList[ languageCode ] = this.interlanguageList[ languageCode ].autonym;
+		languages = $.map( this.interlanguageList, function ( language, languageCode ) {
+			ulsLanguageList[ languageCode ] = language.autonym;
+
+			return languageCode;
 		} );
 
 		// Attach ULS to the trigger
@@ -327,7 +329,9 @@
 		var language, languages, compactLanguages, i,
 			compactedList = {};
 
-		languages = Object.keys( this.interlanguageList );
+		languages = $.map( this.interlanguageList, function ( item, languageCode ) {
+			return languageCode;
+		} );
 
 		compactLanguages = this.compact( languages );
 
diff --git a/resources/js/ext.uls.displaysettings.js b/resources/js/ext.uls.displaysettings.js
index 55678b4d..557c4773 100644
--- a/resources/js/ext.uls.displaysettings.js
+++ b/resources/js/ext.uls.displaysettings.js
@@ -456,7 +456,7 @@
 
 			// Get the saved font using the fontSelector defined in mw.webfonts.setup
 			savedFont = this.$webfonts.getFont( language );
-			fonts.forEach( function ( font ) {
+			$.each( fonts, function ( key, font ) {
 				var $fontOption;
 
 				if ( font !== 'system' ) {
diff --git a/resources/js/ext.uls.languagesettings.js b/resources/js/ext.uls.languagesettings.js
index 40101d18..6fd18cf0 100644
--- a/resources/js/ext.uls.languagesettings.js
+++ b/resources/js/ext.uls.languagesettings.js
@@ -105,14 +105,18 @@
 
 			// Get the name of all registered modules and list them in left side menu.
 			// Sort the modules based on id
-			modules = Object.keys( $.fn.languagesettings.modules ).sort();
-			modules.forEach( function ( moduleName ) {
-				if ( !defaultModule ) {
-					defaultModule = moduleName;
-				}
+			modules = $.map( $.fn.languagesettings.modules, function ( element, index ) {
+				return index;
+			} ).sort();
+			$.each( modules, function ( index, moduleName ) {
+				if ( $.fn.languagesettings.modules.hasOwnProperty( moduleName ) ) {
+					if ( !defaultModule ) {
+						defaultModule = moduleName;
+					}
 
-				// Call render function on the current setting module.
-				languageSettings.initModule( moduleName, defaultModule === moduleName );
+					// Call render function on the current setting module.
+					languageSettings.initModule( moduleName, defaultModule === moduleName );
+				}
 			} );
 		},
 
diff --git a/tests/webfonts.html b/tests/webfonts.html
index fbee034d..0a756453 100644
--- a/tests/webfonts.html
+++ b/tests/webfonts.html
@@ -40,9 +40,9 @@
 			$langselector = $( 'select#language' );
 
 			function listFonts( fonts ) {
-				fonts.push( 'Sans', 'Serif' );
+				$.merge( fonts, [ 'Sans', 'Serif' ] );
 				$fontSelector.find( 'option' ).remove();
-				fonts.forEach( function ( font ) {
+				$.each( fonts, function ( key, font ) {
 					$fontSelector.append( $( "<option></option>" )
 						.attr( "value", font ).text( font ) );
 				} );
@@ -50,7 +50,7 @@
 			}
 
 			listFonts( fonts );
-			languages.forEach( function ( language ) {
+			$.each( languages, function ( lang, language ) {
 				$langselector.append( $( "<option></option>" )
 					.attr( 'value', language )
 					.text( language + " - " + $.uls.data.getAutonym( language ) ) );