private function addNeededFallbackLanguages($keys, &$aux, &$real)
    {
        $loadedLanguage = $this->getMetaModel()->getFallbackLanguage();
        $fallbackValues = $this->getLanguageNames($loadedLanguage);
        foreach ($keys as $key) {
            if (isset($fallbackValues[$key])) {
                $aux[$key]  = \utf8_romanize($fallbackValues[$key]);
                $real[$key] = $fallbackValues[$key];
            }
        }
    }