Index: zenmap/zenmapGUI/MainWindow.py
===================================================================
--- zenmap/zenmapGUI/MainWindow.py	(revision 33857)
+++ zenmap/zenmapGUI/MainWindow.py	(working copy)
@@ -158,6 +158,10 @@
 from zenmapCore.UmitConf import SearchConfig, is_maemo
 from zenmapCore.NetworkInventory import FilteredNetworkInventory
 
+import zenmapCore.I18N
+from zenmapCore.Name import APP_NAME
+from zenmapCore.Paths import LOCALE_DIR
+
 UmitScanWindow = None
 hildon = None
 
@@ -312,6 +316,13 @@
                 _('Create a new scan profile using the current command'),
                 self._new_scan_profile_cb),
 
+            ('Change Language',
+                None,
+                _('_Language'),
+                '<Control>l',
+                _('Change Zenmap language'),
+                self._change_language),
+
             ('Search Scan',
                 gtk.STOCK_FIND,
                 _('Search Scan Results'),
@@ -370,6 +381,19 @@
                 _('Shows the application help'),
                 self._help_cb),
             ]
+        
+        Langs = os.listdir(LOCALE_DIR)
+        for lang in Langs:
+            if os.path.isdir(os.path.join(LOCALE_DIR, lang)):
+                self.main_actions.append(
+                    (lang,
+                    None,
+                    _(lang), # you can change this menuiterm name in translation
+                    None,
+                    _(lang), # and this info also
+                    self._change_language
+                    ) 
+                )
 
         # See info on UIManager at:
         # * http://www.pygtk.org/pygtk2reference/class-gtkuimanager.html
@@ -411,6 +435,24 @@
         <menu action='Profile'>
             <menuitem action='New Profile'/>
             <menuitem action='Edit Profile'/>
+        """
+
+        self.default_ui += """
+            <menu action='Change Language'>
+        """
+        
+        # Add thoses languages to UI
+        for lang in Langs:
+            if(os.path.isdir(os.path.join(LOCALE_DIR, lang))):
+                self.default_ui += """
+                <menuitem action='%s' />
+                """ % lang
+
+        self.default_ui += """
+            </menu>
+        """
+
+        self.default_ui += """
         </menu>
 
         <menu action='Help'>
@@ -928,7 +970,18 @@
                 self.scan_interface.inventory.get_scans())
         self.diff_window.show_all()
 
+    def _change_language(self, widget=None):
+        """Change Zenmap language"""
+        # get language name that user choose
+        lang = gtk.Buildable.get_name(widget)
 
+        # below is just a test
+        import gettext
+        t = gettext.translation(
+            APP_NAME, LOCALE_DIR, languages=[lang, "UTF-8"], fallback=True)
+        t.install(unicode=True)
+
+
 def show_help():
     import urllib
     import webbrowser