/**
* Define all locales which in which a new translation is allowed.
* Checked in {@link canTranslate()}.
*
* @param array List of allowed locale codes (see {@link i18n::$all_locales}).
* Example: array('de_DE','ja_JP')
*/
static function set_allowed_locales($locales)
{
self::$allowed_locales = $locales;
}