Thanks for the reply, Doc! Indeed, a French colleague has given me the same translation ... pardon, mes amis, mais je parle Francais comme un enfant Gallois!
What confused me is that CityJet don't have Tempo Challenge on their metal, but at least I got ushered through the fast security/passport lanes at CDG.
Perhaps they tried/wanted to u/g me to Affaires but, after (a very early) check-in they may have moved the class-divider forward a row or two.
If it should happen again, I'll point out the BP to the FAs!
--Henry