What is the scope of learning French in aviation, BPO or any other industry? If French is not beneficial, which language should I learn?

As the French language is the official language of the Olympic Committee, NATO and also for United Nations, it is one of the most spoken languages in the world. And, is also most researched in the world. As it is relatively easy to learn than other most spoken languages, you can work in sales, the f

It depends, in which country you want to work. You should be fluent in English, and then focus on any other language. If you are wishing to work in Germany or Japan, you should know their language, otherwise English will work.