public static function resolver(string $locale):string
    {
        $file = JsonListener::open(FEnv::get("app.config.file"));
        if (true === property_exists($file, "locale_enabled") &&
            true === $file->locale_enabled) {
            $vals = $file->locale_values;
            return ($vals[0]->$locale);
        }
        throw new Server500(new \ArrayObject(
            array("explain" => "Cannot get locale : App locale mode is not enabled.",
            "solution" => "Please enable the locale mode in config.json to use it")
        ));
    }