Well, it's a German boat so you might aswell have German labels on your controls no?
edit: If you really need English labels try making a post in the ACM Reloaded thread asking for advice... (I think it is ACM reloaded which makes those changes) mine have always been in German anyway but I have seen pictures and video of people using this mod with all its features except for the labels still appearing in English, and I gather you've had them in English before. So there must be a way to get them back.