pendalf89\filemanager\Module::t PHP Method

    public static function t($category, $message, $params = [], $language = null)
    {
        if (!isset(Yii::$app->i18n->translations['modules/filemanager/*'])) {
            return $message;
        }
        return Yii::t("modules/filemanager/{$category}", $message, $params, $language);
    }

 /**
  * Updated mediafile by id
  * @param $id
  * @return array
  */
 public function actionUpdate($id)
 {
     $model = Mediafile::findOne($id);
     $message = Module::t('main', 'Changes not saved.');
     if ($model->load(Yii::$app->request->post()) && $model->save()) {
         $message = Module::t('main', 'Changes saved!');
     }
     Yii::$app->session->setFlash('mediafileUpdateResult', $message);
     return $this->renderPartial('info', ['model' => $model, 'strictThumb' => null]);
 }