code: function () {
  			var i18n = this;
  
  			// Set locale of String environment
  			String.locale = i18n.locale;
  
  			// Override String.localeString method
  			String.prototype.toLocaleString = function () {
  				var localeParts, localePartIndex, value, locale, fallbackIndex,
  					tryingLocale, message;
  
  				value = this.valueOf();
  				locale = i18n.locale;
  				fallbackIndex = 0;
  
  				while ( locale ) {
  					// Iterate through locales starting at most-specific until
  					// localization is found. As in fi-Latn-FI, fi-Latn and fi.
  					localeParts = locale.split( '-' );
  					localePartIndex = localeParts.length;
  
  					do {
  						tryingLocale = localeParts.slice( 0, localePartIndex ).join( '-' );
  						message = i18n.messageStore.get( tryingLocale, value );
  
  						if ( message ) {
  							return message;
  						}
  
  						localePartIndex--;
  					} while ( localePartIndex );
  
  					if ( locale === 'en' ) {
  						break;
  					}
  
  					locale = ( $.i18n.fallbacks[i18n.locale] && $.i18n.fallbacks[i18n.locale][fallbackIndex] ) ||
  						i18n.options.fallbackLocale;
  					$.i18n.log( 'Trying fallback locale for ' + i18n.locale + ': ' + locale );
  
  					fallbackIndex++;
  				}
  
  				// key not found
  				return '';
  			};
  		}
docs: Initialize by loading locales and setting up
  String.prototype.toLocaleString and String.locale.