I18n: Update translation fr (100%).

44 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
I18n: Update translation de (100%).

44 translated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).
I18n: Update translation ast (70%).

31 translated messages, 13 untranslated messages.

Transifex (https://www.transifex.com/projects/p/xfce/).