See, I drive myself up the wall. Whenever I'm conversing with a native English speaker for a prolonged time, I will have grammatical errors.
It's inevitable. I hate it, and it gnaws on my self esteem.
It seems to me that people speaking English as a second language are not so terrible, vocabulary or spelling-wise, but their grammar can be a bit messy.
I'm happy Indonesia got a lot of mention in this forum, by the way.