Believe it or not: Installing Xubuntu again, I selected French (instead of Swedish), and then, at the keyboard selection, I could select French and Swedish keyboard too (all the choices were there). I continued the installation, and yes, I could get French text in menus etc, and a Swedish keyboard ported to the installed system.
(But I can't get a Swedish keyboard if I select Swedish language in the beginning of Ubiquity.)
This is weird!
Believe it or not: Installing Xubuntu again, I selected French (instead of Swedish), and then, at the keyboard selection, I could select French and Swedish keyboard too (all the choices were there). I continued the installation, and yes, I could get French text in menus etc, and a Swedish keyboard ported to the installed system.
(But I can't get a Swedish keyboard if I select Swedish language in the beginning of Ubiquity.)