[emile]

I find that after years living in Taiwan and China, there are certain ungrammatical things I say (outside of the classroom, of course) because I know that I am more likely to be understood by a Chinese learner of English that way.

...and speed. My students once remarked that they could understand me when I talked to them, but not when I talked to another teacher. I realised that I slow down a lot for them to understand. Now I do the opposite, I intentionally speak quickly when teaching the advanced levels.