Only raise your voice if requested. Brief concise written notes may be helpful. If an interpreter is present, the interpreter should be seated beside the interviewer, across from the interviewee. Speak to the interviewee, not to the interpreter and always maintain eye contact with the interviewee, not the interpreter. The interpreter will be at least a few words behind the speaker, so allow for the extra time before the interviewee begins to respond.
Interpreters facilitate communication.
They should not be consulted or regarded as a reference for the interviewee.