It is a matter of public record that French ATC speaking French to a French aircraft at a major international airport in France almost caused the death of hundreds of people.
Like it or not, and the history is irrelevant, English is the language of aviation and the sooner the French cease their xenophobic attitude towards all things English then the sooner the aviation world will be a safer place.
By all means insist on all things in France being French, but leave aviation to aviators who understand the importance of effective communication!