We discuss some work on this in the comment thread directly below - you can download an initial version with a German dictionary from the related github issue.
It remains to be seen how well the user interface text can be translated and still fit within the current constraints.
There is now a version (0.85+) with a German dictionary (see limitations noted above) and translated User Interface text. Looks like your wish came true. :P
Thanks to Skite2001 for User Interface translations!
