fixed #2732 -- group creation now using language keys, and no longer succeeds if a group by the name of 'guest' is created.

public/src/utils.js

@@ -71,6 +71,7 @@
 		trimTrailingDash: /-$/g,
 		trimLeadingDash: /^-/g,
 		isLatin: /^[\w]+$/,
+		languageKeyRegex: /\[\[[\w]+:.+\]\]/,
 
 		//http://dense13.com/blog/2009/05/03/converting-string-to-slug-javascript/
 		slugify: function(str) {
@@ -108,6 +109,10 @@
 			return !isNaN(parseFloat(n)) && isFinite(n);
 		},
 
+		hasLanguageKey: function(input) {
+			return utils.languageKeyRegex.test(input);
+		},
+
 		// shallow objects merge
 		merge: function() {
 			var result = {}, obj, keys;