diff --git a/DSView/pv/mainwindow.cpp b/DSView/pv/mainwindow.cpp
index 61e446ad..1b4c4908 100644
--- a/DSView/pv/mainwindow.cpp
+++ b/DSView/pv/mainwindow.cpp
@@ -1425,6 +1425,9 @@ bool MainWindow::eventFilter(QObject *object, QEvent *event)
  
 void MainWindow::switchLanguage(int language)
 {
+    if (language == 0)
+        return;
+
     SigSession *_session = _control->GetSession();
     DevInst *dev = _session->get_device();
     dev->set_config(NULL, NULL, SR_CONF_LANGUAGE, g_variant_new_int16(language));
@@ -1444,12 +1447,15 @@ void MainWindow::switchLanguage(int language)
         qApp->installTranslator(&_myTrans);
         retranslateUi();
     }
-    else
+    else if (language == LAN_EN)
     {
         qApp->removeTranslator(&_qtTrans);
         qApp->removeTranslator(&_myTrans);
         retranslateUi();
     }
+    else{
+        qDebug()<<"Unknown language code."<<language;
+    }
 }
 
 void MainWindow::switchTheme(QString style)