The crew talk for the MTH European locomotives is in the appropriate European languages. In the case of the Swiss electrics (both the Crocodile and the modern SBB Cargo unit), that means the dialogue is in Schwyzerdeutsch, a German dialect spoken in Switzerland. it is almost impenetrable to anyone who doesn't speak that specific dialect. I can speak passable German, and I can't understand a word of it. I played it for a native German speaker who is a member of our club, and he couldn't make head or tail of it either.
On the other hand, the passenger station announcements in French for the Orient Express are a lot of fun - they set the right atmosphere even if you don't speak French (I do, but badly). And I love that high-pitched Euro whistle!