There's a good (but old one) available from the NYTimes[1] - a lot of it actually centers on which words you use for certain things (i.e. roundabout vs. rotary[2]) and rhyming like if you pronounce aunt and aunt as onht or ahnt or pronounce each one differently.
1. https://www.nytimes.com/interactive/2014/upshot/dialect-quiz...
2. Guess where I'm from!