My situation: 28, a French engineer (from a "Grande Ecole") and currently doing a PhD in Computer Vision / Deep Learning.
I have always been passionate about learning languages, and I am fortunate to have parents that taught me well in this regard.
I currently speak fluently (as in "I can at least work in with people in said language"): French / English / Spanish / Russian / Portuguese.
I also have beginner/intermediate knowledge of Ukrainian and Chinese.
What can I do with all this knowledge? Note that I have learnt these languages because I love studying them. But if I earn more money at the same time, even better!
Edit: in response to the comments / answers, I am not interested for now in completely switching fields, as becoming a full-time translator. Still, if the offer is good enough and the job is not full time (like giving conferences once a week), why not?
As a side note, I am not really sure about what to do after my PhD. The "default path" would be to work in R&D, be it in France or abroad. However, in France, it seems that unless I start having more responsibilities (so moving up to managerial roles), become a consultant, or have my own - hopefully successful - company my own pay may be "fairly good", but is not likely to ever be "great" (>70k€).
All in all, my question is more about how to seek more opportunities using the languages I can speak. I guess that I could work in the countries whose language I speak? But I have no idea where to find a job where fluently speaking 5+ languages is a "useful plus" (and not just something that looks nice on my CV). It is not like there are job offerings with this requirement (?). Any suggestions?