In addition to cultural differences, there are language differences. Avoid using an interpreter if at all possible. Very often, a new client who speaks English only with difficulty will come to your office with a friend or relative to interpret. During the first meeting or two, it is probably well to use the client's interpreter to gain confidence and establish a relationship. But, you should try to move into the English language as soon as possible.
All good lawyers know why.
The root of a lawyer's work is based on a relationship. The more direct that relationship is, the better you will do. If your client simply does not know enough English to be of any help to you at all, then one possible alternative is to associate another lawyer who is conversant in the client's native tongue. The next best alternative is to use an interpreter who is skilled in both English and the client's native tongue. The most problematic type of interpreter is the client's friend or relative.