Indeed. As to the nitpick: as a non-native speaker of English I'm well-aware that intuitions about actual mistakes people make are often wrong if that's what y

Indeed. As to the nitpick: as a non-native speaker of English I'm well-aware that intuitions about actual mistakes people make are often wrong if that's what you're hinting at. I actually saw a nice example of that in a course on forensic linguistics back in university: a suspected criminal wrote a letter containing a number of glaring grammatical mistakes and the investigators at the time assumed it must have been a German immigrant but to us Germans it was obvious that those mistakes couldn't have been made by a native German speaker no matter how bad he was at English: even "broken English" follows rules. Fun fact: the only person I've ever met who had a true Hollywood movie villain WW2 German accent in English was actually from Eastern Europe and had a thick accent in German as well.