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diff --git a/www/wiki/extensions/UniversalLanguageSelector/resources/js/ext.uls.i18n.js b/www/wiki/extensions/UniversalLanguageSelector/resources/js/ext.uls.i18n.js
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+/*!
+ * ULS i18n preparation using jquery.i18n library
+ *
+ * Copyright (C) 2012-2013 Alolita Sharma, Amir Aharoni, Arun Ganesh, Brandon Harris,
+ * Niklas Laxström, Pau Giner, Santhosh Thottingal, Siebrand Mazeland and other
+ * contributors. See CREDITS for a list.
+ *
+ * UniversalLanguageSelector is dual licensed GPLv2 or later and MIT. You don't
+ * have to do anything special to choose one license or the other and you don't
+ * have to notify anyone which license you are using. You are free to use
+ * UniversalLanguageSelector in commercial projects as long as the copyright
+ * header is left intact. See files GPL-LICENSE and MIT-LICENSE for details.
+ *
+ * @file
+ * @ingroup Extensions
+ * @licence GNU General Public Licence 2.0 or later
+ * @licence MIT License
+ */
+
+( function () {
+	'use strict';
+
+	mw.uls = mw.uls || {};
+
+	// JavaScript side i18n initialization
+	$.i18n( {
+		locale: mw.config.get( 'wgUserLanguage' )
+	} );
+
+	// ApiULSLocalization handles fallback in ULS
+	$.i18n.fallbacks = {};
+
+	/**
+	 * Load localization messags for a locale to the jquery.i18n
+	 * messagestore.
+	 * Also called by RL module ResourceLoaderULSJsonMessageModule
+	 *
+	 * @param {string} locale the language code
+	 * @param {Object} [messages]
+	 * @return {jQuery.Promise}
+	 */
+	mw.uls.loadLocalization = function ( locale, messages ) {
+		var i18n = $.i18n();
+
+		i18n.locale = locale;
+		if ( messages ) {
+			return i18n.load( messages, locale );
+		}
+		if ( i18n.messageStore.messages[ locale ] ) {
+			return $.Deferred().resolve();
+		}
+		return i18n.messageStore.load(
+			mw.util.wikiScript( 'api' ) + '?' + $.param( {
+				action: 'ulslocalization',
+				language: locale
+			} ),
+			locale
+		);
+	};
+
+}() );