Comment 2 for bug 52552

I installed language-pack-fr (which included -base-fr) now.
Nothing changed: English still. I even restarted my gdm session as recommended by Synaptic.

The locale description for gcompris boards are *not* in language-pack-xyz. Each board in the gcompris package comes with an XML file full of messages for all countries. E.g. please see
/usr/share/gcompris/board/ballcatch.xml or any other such file.

There are excellent reasons for this: say the school comes to visit me and the kids want to play gcompris in their native languages. It just should work. There should be no need for me to install a Polish and Catalan and Turkish etc. Gnome desktop. The kids don't care about Gnome. All that's needed for the kids is just there in the gcompris package. It's just not working, for whatever reason. That's the bug.