Comprensive look at American English dialects
You could get lost in these maps and data regarding American English dialects for hours. I learned many things, so as the fact that there are 16 vowels (not just a, e, i, o, u and sometimes y), and 24 consonants. I invite you to check this out. And the fact that we haven's pulled things into a homogeneous language, despite all the years of electronic mass communication demonstrates, I believe, that we are inherently tribal--that we are wired to strive to be like our local tribe and different than those who we perceive to be outsiders.