When I was younger and studying Japanese I used to play a popular Japanese MMORPG. It was popular among middle aged individuals (25-50).
I was lucky enough to meet a Japanese clan leader that invited me into one of the largest clans in the game. Fast forward a year or so-- and a new player joined the clan.
One day the new player flipped out on me in our clan chat. Our clan leaders told her I wasn't Japanese and to cut me some slack. She refused to believe I was a foreigner.
On the one hand I was proud. My Japanese was good enough for someone to think I wasn't a foreigner. On the other hand I was sad, I clearly did something wrong.
The clan leader spoke to me in a 1:1 fashion and tried to explain. It wasn't the language I used, but more or less how I interacted with the more senior clan members. I would often suggest things we could do or ask if they wanted to do something. In reality, it was expected to do small talk and wait for senior clan members to suggest something to do. I was crossing some social boundary...