I once came across an interesting dialect quiz that’s supposedly able to narrow down your origins (or at least your speech influences, based on geography. It correctly nailed me down to within 50 miles of my birthplace.
The U.S. Dialect Quiz: How Y’all, Youse and You Guys Talk - The New York Times (nytimes.com)
This is paywalled unfortunately, but maybe some nice person with access could include a gift link