In Butokukan karate, we use Japanese because our master, Yoichi Nakachi, was Japanese, and to be polite, we learn everything in Japanese as well as English. When doing a test, you should be able to answer to a question, about what is this and what is that, in both English and Japanese ( Here's an example: If asked to do a "jodan uke", you reply "upper area block" and show how to do the technique. If asked to do a "lower area block", you answer "gedan uke", and show how to do the technique ).

Bowing: If you ever saw the older movie, "The Karate Kid", you will remember Mister Miyagi teaching Daniel to keep his eyes focused on his opponent even in bowing. This is totally correct when facing an opponent in a tournament fight.  However, in bowing to a person who is Japanese in day to day life, it is customary to lower your eyes so you don't look at the person as you bow, as a sign of respect and courtesy.  Otherwise, you are telling the person, "I don't trust you."  Not something polite to do when meeting a Japanese person for the first time.  In tournaments, you can still be respectful, but it is totally acceptable to keep focused on your opponenet because you are engaged in a serious ( although supervised ) fight in a tournament.

Remember when doing your test to bow politely, and to always show courtesy ( being polite ). There is a saying: Courtesy always first in karate.