If you need to translate something from medieval German to German, you're right here! Quite awkward to work with, but it's realy great you can get this for free.
M. Iyyer, A. Guha, S. Chaturvedi, J. Boyd-Graber, and H. Daumé III. Proceedings of the 2016 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, page 1534-1544. The Association for Computational Linguistics, (2016)