To be fair (and I am not fan of DB and many other rail companies), DB is not the only rail system that splits trains, and it is rather clearly indicated, but you have to 1) expect something like trains that split at specific stops and 2) know what you are looking for on a ticket or billboard, partially because indicating that, especially far in advance is a bit of a UI/design challenge.

Also, I believe you were trying to write "nein". But why would you expect an English announcement in Germany on a German train? Google Maps? What does that have to do with that; it's an unofficial and only like an 80% solution.