On Friday, while the Eurostar I was on was pulling into Calais Fréthun station, the train manager announced in French that we were arriving into Calais, then in English that we were arriving into Lille Europe (the stop after), and finally in Flemish that we were arriving into Calais. Because I've done the trip quite a bit, I knew it was Calais not Lille, but at least one person from my carriage got off then re-joined shortly after looking rather confused.
This got me thinking though, what would've happened if I hadn't known the journey well enough to know which language's announcement had the mistake in it?
In a situation where you hear two (or more) announcements in different languages which appear to contradict each other, what steps/strategies can you take to work out which is correct, to know what to do?