Actually, Winnerhofer, it seems that Air France's imposition of English on its pilots is only for communications with ATC at Roissy (CDG). I don't think there are any existing or proposed French auto-callouts in AF cockpits? On the other hand, the AF checklists, including their QRH, seem still to be in French, and (as the AF447 CVR demonstrated) AF cockpit business is conducted in the native tongue. Far be it from me to offer an opinion on that.
Those of us who have observed some of the actions of SNPL over the decades can understand that pilots forming the residue within AF of the ancien Air Inter, the former French domestic airline, might find it distasteful to adapt to ATC comms in English. It's almost unknown at any French airfield to hear a Francophone pilot speaking English for ATC comms, so this French anomaly is not specific to CDG. As the Liberation article indicates, Air France has been the only non-Anglophone flag-carrier outside the former Soviet bloc refusing to speak English for ATC comms at its home airfields.