DB is weird. They seem to make their own rules and then run the game and “dont tell the rules to anyone”. I was on my way to catch a flight from Munich to my home (Madrid). I didn’t knew that apparently at one point the train splits into two parts and the front part goes to the airport and the other part just goes to the nearby cattle farms and comes back in 3 hours. Google Maps - No idea Citymapper - what? English a…
We took that train, realised when we got to the other end of the line that we hadn't gotten where we expected, then turned back to the place where it separates. Waited for the next advertised train to airport (it's signalled on the electronic board as two separate entries; yes, it says "board whatever carriages for airport, and the rest for ...", or at least I assume it did, as it was in German of course; but again,…
What language do you expect the Germans to use?