It's understandable that the French are miffed that English is the world's lingua franca (tee hee). But what are you going to do, change history? We got Nelson & Wellington - you got the short-arsed Corsican with the tiny todger.
On a slightly more serious note, the very fact that the French & Belgian posters are writing their posts in English kind of proves the point. Domestically, people should use & be proud of their language, vive la difference and all that, but any international ATC communications should be in one language. As Esperanto never took off due to it being rubbish, the only language that fits the bill is English.
Laissez-faire? Non, merci.