> ancestors immigrated as adults, then very likely they didn't learn the national language well, if at all. This might be true in most cases but it is certainl

> ancestors immigrated as adults, then very likely they didn't learn the national language well, if at all. This might be true in most cases but it is certainly possible to become "native speaker" fluent in a foreign language as an adult. I married a Danish woman and moved to Denmark at 24, which I think qualifies as adult. After 6 months, I could participate reasonably well in any conversation. After doing various jobs, many years later, I requalified as a teacher where I got the highest grades possible in Danish. Several native speakers failed the course. I speak with a slight accent but it's not an english accent. Some native speakers think I might be Norwegian or German and some think it's a Danish regional accent. I grew up in South Africa speaking British English. IMO, it was easy for me because I have an academic background, read a lot and was curious and eager to learn. Also, it was fun and empowering, while not speaking the language in the beginning felt like being deaf. I'm now divorced from my Danish wife and have a Vietnamese girlfriend. Vietnamese is a tricky language. Fairly easy grammar, but incredibly difficult pronunciation XD