It is also worthwhile to brush up on your high school or college language. Obviously, there should be some relationship between the language you decide to learn and the needs of your community. Immigration can be a very lucrative field, especially if you are dealing with a businessman who wants to immigrate. He will have corporations to form and relatives to bring in and investments to make. A single immigration client can become a five-figure legal fee.
Immigrants also have their share of accidents and criminal problems.
Just being able to make simple conversation is adequate. No one will expect you to be able to expound philosophically in the foreign language. Of course, you must communicate your language ability. The best way is media advertising. Belonging to the local Chamber of Commerce or cultural club of the foreign country is also a good place to meet these people.