Not sure about the highest paying language, but it seems, these days, if you have a good grasp of a programming language or two and are able to solve problems you can make decent money and have no hard time finding a job.

Follow me @codero and checkout some of my coding related posts:

https://steemit.com/programming/@codero/how-web-apps-work
https://steemit.com/programming/@codero/what-you-need-to-learn-to-become-a-junior-front-end-developer