I’ve gone through the translation directory a couple weeks back and added most of the translations for German. However a good deal of the entries struck me as outdated and/or awkward, not to mention the presence of several duplicates. I left out a couple for now that seemed nonsensical (seriously, file extensions?) or where the context wasn’t entirely clear.
If any of the developers feels up to it, someone should probably have a look over the list and perhaps update it as needed. I’ll be happy to provide any missing translations and answer questions.