Someone should review the german translation! There are too many mistranslations which leaves the user with no clue what some elements mean...
Needs to be reported to the upstream translation team. developer.gnome.org/projects/gtp/
Doesn't make much sense to report this upstream without more details. If you can provide concrete examples of mistranslations, please report them to bugzilla.gnome.org or to gnome-de-list