new option: 'HELPDESK_FOOTER_SHOW_CHANGE_LANGUAGE_LINK'

If activated, a 'change language' link will be shown in the footer.
You need to add this line to your 'urlpatterns' variable in your
urls.py file:

(r'^i18n/', include('django.conf.urls.i18n'))

helpdesk/views/public.py

@@ -131,3 +131,6 @@ def view_ticket(request):
             'helpdesk_settings': helpdesk_settings,
         }))
 
+def change_language(request):
+    return render_to_response('helpdesk/public_change_language.html',
+        RequestContext(request, {}))