/**
* Selects the language to use in the user interface, if it has been
* registered before.
*/
public static function setLang($lang)
{
if (!array_key_exists($lang, self::$availableLangData)) {
return false;
}
self::$lang = $lang;
self::$langData = self::$availableLangData[self::$lang];
return true;
}
