Some have voiced displeasure with their experiences or lack of success at understanding instruction delivered by persons whose first language was something other than English, and who spoke the language with difficulty.
First, I have had difficulty understanding the spoken English of quite a few people who grew up in the U.S. and who considered themselves to be native speakers of English. That includes some who were my instructors in college. I have also experienced instruction from Oriental persons. I'll relate one as an example. I had a laboratory instructor for a statistics course whose first language was Chinese, and I do not know which dialect. Understanding his speech was difficult for this Texan (a good many people have had difficulty understanding me, also). Some of the students in the class complained, first among themselves, then to the professor in charge of the course, and eventually to the department chair and the dean. They spent a lot of time and energy on their complaints. Meanwhile, I visited the instructor in his office hours. He said I was the only student in the course who came to him for assistance. His office hours became my personal tutoring session. He asked me to forgive him for not speaking better English. I did, and told him I just wanted to learn the subject matter. He worked hard to help me, and I worked hard to understand him, and learn the material. I earned an "A" in the course, and got to know a kind, caring, and helpful person, who gave me his time and attention. He was trying to do a difficult job (teach), while laboring under the handicap of poor communication between himself and his students. He and I both learned a lot that semester. David McNeely
