Translation is one of the fastest growing industries in the United States of America. The US department of labor currently estimates that demand for translation services will increase by almost 20% over the next ten years. That means that this is the exact right time to get involved and make money from your ability to take words from one language and turn them into another.
You don't have to travel around as an interpreter to earn your money as a translator, either. Websites like Fiverr, Upwork and Gengo are full of people offering to translate text, or translate from audio recordings, for a set price per word or minute. If you happen to be bilingual, you probably do this every day of your life inside your head. Why not take it out of your head, put it on paper, and get it earning money from you? Corporate clients in particular pay big money for good translators.