Well, it will run, but there's no German localization for the mod, only English and French.  So you'd have to copy the English global.res file from the mod and paste it into your game's German "locale" folder.  Otherwise the text for new monsters, items, and quests would be empty (blank). I could try to run the new text through an auto-translation service, but there hasn't been much demand for the mod in other languages.  That would also be a huge endeavor due to how much I've rewritten.