@ Sop_Monkey...
WTH are you talking about?
What does language have to do with this?
Are you suggesting the French crew spoke in French in Russia to ATC and the Russians spoke in Russian to the French crew?
As for English being the most spoken language in the world you are wrong!
Mandarin (Chinese) is the most spoken language in the world almost 3 times more than English, followed by Spanish and then English. So by your logic we should learn Mandarin and/or Spanish to communicate in aviation but I know that will never happen because you have a hard time learning French.