I'm sure you can be very helpful as a translator of some sort. You may even be able to help those who just came to America and speak any of the languages you mentioned (besides English) to help them learn English as a second language (ESL). Try searching in your local directory and post an ad describing you skills. With your vast knowledge of Asian (please correct me if I am mistaken, I'm not sure if your other 3 languages are indeed Asian) languages, I'm very sure that in California you could very helpful! As long as you are kind, patient and respectful you could make an excellent ESL instructor, or teaching English speakers the language (
Kijiji United States: free local Classifieds Ads and Want Ads for Housing, Apartments, Furniture, Personals, Vacation Homes, Pets, Jobs, Resumes, Cars, Services, Events, Appliances, Discussions and more. can help you search for those interested in learning the languages you speak in your area, and vice versa); but if you are not interested in that, translation services may be needed by businesses, etc. My suggestion is that you research jobs involving the knowledge of these language(s) in your area, and online resources can be very helpful for this.
Hope that helps.
Emily