Merged, thanks, German is complete.
Attaching source XMLs for English and German, if someone wants to fix the inconsistencies with "Mail" vs. "Nachricht".
Please a plain text editor (i.e. not Word, WordPad, or WordPerfect) that understands UTF-8.
For Windows: Notepad++ and PSPad are both free.
For Linux: gEdit, Geany, Sublime Text...