Many moons ago, I was 20 minutes astern of my Flight Commander, who spoke fluent French, en route Malta to Ice Station Kilo. Having been listening out on the appropriate French ATC freq, and having heard several transmissions 'en Français,' approaching St Tropez the boss made his initial report in impeccable French. The snotty reply from French ATC?
"RAFAIR XYZ, today on ze airways, we speak Eengleesh!"
Chauvin was a Frenchman, and is still alive and well in 'La Republique.'