protected function _getLangFileCacheName($blAdmin, $iLang, $aLangFiles = null)
    {
        $myConfig = \OxidEsales\Eshop\Core\Registry::getConfig();
        $sLangFilesIdent = '_default';
        if (is_array($aLangFiles) && $aLangFiles) {
            $sLangFilesIdent = '_' . md5(implode('+', $aLangFiles));
        }

        return "langcache_" . ((int) $blAdmin) . "_{$iLang}_" . $myConfig->getShopId() . "_" . $myConfig->getConfigParam('sTheme') . $sLangFilesIdent;
    }