The de-DE translation is available in the 0.8.3 release, together with some minor bugfixes for Google users.
The first sync after an upgrade to this version is a slow sync.
If you sync with Google and experience a conflict after an upgrade to this version, it may relate to the bugfix for the Google ‘company’ and ‘title’ fields. The conflict resolution UI will correctly select the Google version. Simply click “confirm” and the next sync will work fine.