dosamigos\fileupload\BaseUpload::initI18N PHP Method

    public function initI18N()
    {
        Yii::setAlias('@fileupload', dirname(__FILE__));
        if (empty($this->i18n)) {
            $this->i18n = ['sourceLanguage' => 'en', 'basePath' => '@fileupload/messages', 'class' => 'yii\\i18n\\PhpMessageSource'];
        }
        Yii::$app->i18n->translations['fileupload'] = $this->i18n;
    }