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On the developer's page, there is also a German mod for the game. Simply put the zip file into the assets directory of the game without unzipping it.

Auf der Seite des Entwicklers ist auch eine deutsche Mod für das Spiel. Die zip-Datei einfach in den assets-Order kopieren, ohne sie zu entpacken.
Post edited October 08, 2014 by Falkenherz