public function getInterfaceTrans()
    {
        $locale = config('app.locale');
        $file = config('crude.defaultInterfaceTrans');

        if ($file == 'CrudeCRUD::crude') {
            $available = ['en', 'pl'];
            $locale = in_array($locale, $available) ? $locale : 'en';
        }

        $this->interfaceTrans = array_merge(
            \Lang::get($file, [], $locale),
            $this->interfaceTrans
        );

        return $this->interfaceTrans;
    }