I’ve just wasted a perfectly good morning scrolling through my own pronunciative history. Joshua Katz, a Ph.D. student in statistics at North Carolina State University, has produced a series of visualizations of the Cambridge linguist Bert Vaux’s online survey of English dialects, as applied to the continental United States. There are various pretty patterns of blue, red, 
green, yellow, and the blends in between, and you can check 122 maps showing regional differences in pronunciation, word choice, and syntax according to the questions posed by the survey.
Now, clicking on the maps—and trying to guess, ahead of time, at the four most popular answers to each question—is fun all by itself. I couldn’t guess, for instance, at No. 83, “what do you call an easy course?” but I was all over No. 36, “how do you pronounce the c in grocery?” But more interesting, for me, was …