I had an old Scottish friend in Bangkok and had to sometimes translate for our American mutual friend.🙂 Wally was from the borders area, to my ear never had a 'thick' accent, as some from Glasgow do.
I spent some time working in Australia, some of the young Ozzies I worked with had parents who had emigrated from the UK. They used to say mum & dad had Ozzie accents, but only when they weren't drunk, at which point they would revert to Geordie or Scouse or whatever, which their Ozzie kids (my colleagues) could imitate, very funny!😆