A: Humans mimic others speech (unconsciously) in order to fit in. EG: person from country A moves to country B. Both countries speak English. A few years later A moves home. People in country A now hear a country B accent when this person talks.
Yep. As an American who’s lived in Korea for about 10 years, I catch myself doing this all the time when speaking English to Koreans who understand some English. I also find myself doing the same thing to other Americans, and even my family.
I’ve also been told that I speak Korean with a female accent. I’m pretty sure it’s because the majority of my Korean language exposure is from my wife of 18 years, and her friends. I’ve only really started making male friends of my own in the past three years or so.