One thing I always found fascinating are swedes moving to the US and begin speaking Swedish with an American accent after 10+ years. Not as a thing. They really

One thing I always found fascinating are swedes moving to the US and begin speaking Swedish with an American accent after 10+ years. Not as a thing. They really sound like a US immigrant, with all the same un-idiomatic errors that many do, even after many years in Sweden. I mean, Sweden is not their home any more, and Swedish is not their main language, but as someone who has lived abroad I can't understand how it happens.