diff --git a/src/frame/qqtapplication.cpp b/src/frame/qqtapplication.cpp
index de49a9fc..27494c37 100644
--- a/src/frame/qqtapplication.cpp
+++ b/src/frame/qqtapplication.cpp
@@ -18,6 +18,8 @@
 #include <qqtinput.h>
 #endif
 
+QQtApplication* qqtApp = NULL;
+
 QQtApplication::QQtApplication ( int& argc, char** argv ) :
     QApplication ( argc, argv ),
     bUPanAutoRun ( false )
@@ -39,6 +41,8 @@ QQtApplication::QQtApplication ( int& argc, char** argv ) :
     QSettings::setPath ( QSettings::IniFormat, QSettings::UserScope, CONFIG_PATH );
     QSettings::setPath ( QSettings::IniFormat, QSettings::SystemScope, CONFIG_PATH );
 
+    qqtApp = this;
+
 #ifdef __DARWIN__
     QDir::setCurrent ( qApp->applicationDirPath() );
 #endif
@@ -215,4 +219,5 @@ void QQtApplication::setLanguage ( QString qmfile )
     language->load ( qmfile );
     pline() << "currentLanguage" << qmfile;
     installTranslator ( language );
+    emit languageChanged();
 }
diff --git a/src/frame/qqtapplication.h b/src/frame/qqtapplication.h
index aa90d634..b0b909d7 100644
--- a/src/frame/qqtapplication.h
+++ b/src/frame/qqtapplication.h
@@ -28,7 +28,7 @@ public:
     virtual int unInitInstance() { return 0; }
 
 signals:
-
+    void languageChanged();
 public slots:
     void slotUPanAutoRun ( int status );
 private:
@@ -38,4 +38,6 @@ private:
     QTranslator* language;
 };
 
+extern QQtApplication* qqtApp;
+
 #endif // QQTAPPLICATION_H