Across the Pond
I’m English, but have spent much of my youth in the US, and live here now with a green card. When I worked retail, I adopted an American accent, because it’s more efficient than having to explain to everyone that I’m English and moved here when I was 14 etc etc. It was just more efficient.
This continued into office jobs until we were in a meeting with some English clients, who spoke first. I immediately went English. By boss looks at me for second, stops the meeting and says “Are you having a stroke?”
Then I had to explain and we wasted half an hour. Sigh. Story credit: Reddit / UnknownQTY