I don't know if you've ever run into it, but there's a thing on YouTube called the "accent tag". It's a list of vocabulary words and questions that you're supposed to answer on camera in whatever your native accent is, basically to show people on other parts of the planet how you talk. Most of them are pretty ordinary, but occasionally you get a fantastic mashup. This young lady here popped up when I was searching for "transatlantic accent". She has not actually got one -- it's a specific regionless accent, popular among actors and some of the American upper classes prior to and during WWII -- but she dubbed hers this, as she picked it up accompanying her father on a lot of ocean crossings as a kid. The word list is really just a collection of shibboleths, and it's very heavily biased towards American regional accents. "Wash" turns into "warsh" in Missouri; "caramel", "New Orleans", "may...