I assume swear words are a part of it, too, but the teams definitely wouldn't have agreed to it, expecially not for just 5000 Euros, if it could give their opponents some very useful intel.
Teams would definitely need to be creative. Invent some sort of code, or something.
Of course, as we learned a few years ago, when Pogacar goes solo off the front, not even his teammates understand what Hauptman is saying! Well... Novak does, I guess.