Asked in French Language and Culture
How much money does a fluent French speaker earn per year?
That's not a terribly meaningful question, any more than asking how much a person who speaks English earns. It depends on what you do for a living and how good you are at it!
If you are referring to someone who is bilingual, again, the answer depends on where and how you use your talents. There are many international firms where a bilingual speaker can earn more than a non-speaker in a comparable position, and certainly be offered more and more varied opportunities. But the overall salary grade depends very much on the company you work for and the industry you work in, so there is no fixed answer.