public function getServerBundle($langCode)
    {
        $cache = $this->getServiceLocator()->get(common_cache_Cache::SERVICE_ID);
        try {
            $translations = $cache->get(self::TRANSLATION_PREFIX.$langCode);
        } catch (common_cache_NotFoundException $ex) {
            $translations = $this->buildServerBundle($langCode);
        }
        return $translations;
    }