"My point is that you can "see" (guess) ethnicity and "hear" language, but that does not tell you someone's country of origin." You don't need to know someone'

"My point is that you can "see" (guess) ethnicity and "hear" language, but that does not tell you someone's country of origin." You don't need to know someone's origin to guess at their immigration status. The UK is not quite America. When you step outside of London, simply one's accent can instantly betrays one's class, and one's regional origin within the UK! The last time I was in Eastern Europe, people would immediately speak to me in English. They could tell simply by the way I dressed (quite normally) that I was a foreigner. That was pretty weird actually.