Jean-Pierre Chrétien wrote: > I don't unserstand what happened, a lot of strings which are not > translated in frenchb.ldf have disappeared.
Yes. This was done intentionally, because these strings are not needed for most languages. Note that you can readd these translations manually to lib/layouttranslations if needed, and they will stay in the future. I can't judge whether this is a good idea, but it is technically possible. Georg