@ Sop_Monkey
ICAO as many official languages (English, French and Spanish to name a few).
ICAO was born from the Chicago convention in 1944 where the meetings were done in English and so English was then thought to be the "de facto" language but it was not.
Also since most of the aircraft manufacturers were of English background (at that time) that helped re-enforced the notion that English was the "official" language.
However, ICAO rules states that the local language of a country is allowed to be used but that English should be available at the request of a flight crew.
Good luck with that in certain areas of the world my friend. Even in South America English is not available at some airports.
But back to your original post... You never answered my question. What does French or Russian language have to do with this crash?