Like "Ladies and Gentlemen. Train XYZ 123 from Hamburg Hauptbahnhof to Hamburg Harburg, originally arriving on track 12. This train is going to be late by 3 hours. Please take bus 112 instead"? And yes this is how they would say it, just literally translated to English.
Seriously, which part here is language related vs. just structuring your announcements in a way where all information you need is presented in the way it makes sense? If you don't announce which train this is about first, then lots of people will have to listen to lots of announcements even though they're not meant for them. If you know your train number you can stop listening at "123". If you just know your destination and the trains origin/where you are you can stop listening right there etc.