I'm running 11.04. I want the system language to be in German. When I go to Language Support and Install/Remove Languages, I check the German box and Apply Changes.

However I'm told that the package is already installed and that there isn't any need for an installation. Expanding the Details shows:

Package [dbus.String(u'libreoffice-gnome')] is already installed

However, German doesn't appear in the Language for menus and windows list. How should I resolve this?

The problem is the same when I tried Esperanto and Afrikaans.