If you do need live, simultaneous interpretation, then you are in the right place.
After launching your meeting, ensure that your interpreter changes their display name to include the word "interpret". For example: "Maria (interpreter)".
Once you have at least one participant who is identified as an interpreter, an interpretation slider will appear for all participants. If they slide it toward the interpret side, they will only hear the interpreter and none of the other participants. If they slide it toward the "live" side, they will only hear the participants and not the interpreter.