Is There a Language Barrier?

I taught intro linguistics and that was about 300 students. I had two or three a teaching sins who were graduates, students an linguistics. And sometimes they were not american. One year, i had one American graduate student,. Two japanese graduate studentsso from japan. They spoke english with an accent, both of them. The first year that that happened, i got complaints right away. Ah, i don't want this person when we're in discussion hour. I, i don’t like her accent. I want to be in the other session. But can you expound about that a little bit? What exactly did you hear fromStudents? I'm curious