I just tested again and this is not a bug, it's a feature. When GCompris is set to the system locale it respects the LANG env variable. And BTW this is releated to the Gtk+ version, not the Qt one.
I just tested again and this is not a bug, it's a feature. When GCompris is set to the system locale it respects the LANG env variable. And BTW this is releated to the Gtk+ version, not the Qt one.