For a beginner, which is the better choice, a local or a native teacher?

If he chooses a local teacher, he might get an incorrect accent. But if he chooses a native English teacher, he might have difficulty in understanding the language. Which is the better choice? (Probably slightly better to say "which" here instead of "what".)

I have helped some native English speakers find students. After some classes, the students who were at the beginner level (some were of an even higher level) told me that it was hard to understand and communicate with the teachers. I got confused. Maybe, a local teacher is a better choice for students who are learning basic vocabulary?

The above is my composition. Please correct it. Thank you!

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I think ideally it would be good for beginners to be taught by native English speakers who know their local language well. For example I (an English speaker) started learning Spanish at university with a teacher who is from Spain, but speaks very good English. This had the advantage that he could explain things in English but also demonstrate correct Spanish with perfect pronunciation. It didn't matter that he had an accent when he spoke English, as he was perfectly understandable. However, this isn't always possible, as depending on the local language, there might not be teachers available who speak it.

Great composition, by the way! :)