public function run()
 {
     if (null == $this->currentId || null === ($current = \Yii::$app->languageManager->getById($this->currentId))) {
         $current = \Yii::$app->languageManager->getCurrent();
     }
     return $this->render('default', ['current' => $current, 'langs' => Language::find()->all()]);
 }