Advice on what to advise?

A male colleague has been having a problem with a particular student. He teaches at a good university here. He doesn’t speak Japanese sufficiently well enough and has a trouble maker female student who wants him to teach academic English to her in Japanese. It’s an intermediate class. During group discussions, student would simply asks him a question in Japanese just to throw him off. Or couldn’t understand instructions because JTEs have been teaching in Japanese areas of English. It got to an extent where another female student would hold the trouble maker female student hands back just to signal the partner to stop it. The attitude student is freshman first year. His course is twice weekly for a year and students need to take an IELTS or TEAP exam at the end of the 2 compulsory semesters.

What should I advise my friend? He seems distraught as the curriculum requires academic English be taught in English. What can he do or what comeback strategies to discipline a 19 year old ‘adult’ student apart from learning more Japanese which is life-long learning. Leaving to the wisdom of Redditors here.

by WaulaoweMOE