Adults don't get the same treatment as children. If a non-native child lives in a foreign language environment and uses the wrong pronunciation/grammar, they w

Adults don't get the same treatment as children. If a non-native child lives in a foreign language environment and uses the wrong pronunciation/grammar, they would be corrected by friends and teachers. But adults won't get that feedback often. Example, one of my colleague is non-native. He speaks with almost perfect pronunciation/grammar, yet he has some minor quirks from time to time. I don't correct him because his language skills are more than adequate for the job and we are engineers, not language teachers. Another example, I do not speak English natively, so my writing still contains grammatical errors. As my language skills improved, I stopped receiving feedback for my writing, it had become good enough. Sometimes, I get a hint of feedback like: "Wow, I didn't notice that you are non-native.". People say that because they noticed my unnatural writing, I guess that's a polite way of saying "You failed". Grammar is hard. My French is unreadable.