Attending a judo seminar by a very senior, high-ranking Japanese judoka – etiquette?

Hi there! I'm roughly N3 level. As the title says, I will be attending a judo seminar by a 7th-dan native Japanese teacher who does not speak my language (he travels with an interpreter) and I would like to speak Japanese when possible to him. Are you aware of a resource for judo/martial arts etiquette, how to address a high-ranking teacher, common phrases heard at the dojo, level of politeness/humility expected etc? Thanks in advance.

by its_hipolita