North Carolina State statistics graduate student Joshua Katz already mapped dialect across the United States, and now there’s a fun addition in quiz form. Answer the 25-question survey (or the more detailed 140-question version if you dare), and you get a map of language similarity. More specifically, the result maps shows the probability that someone in that area understands what you’re saying.

My results were dead on.

Update: Katz went to The New York Times where they published a refined version of his map, becoming then the most viewed page in the site’s history.