Are we speaking the same language?

I'm fascinated by how we speak one language, with many differences.  Consider this story, from Business Insider:

http://www.businessinsider.com/22-maps-that-show-the-deepest-linguistic-conflicts-in-america-2013-6?op=1

Love the "soda vs. pop" chart.  And the "bubbler" usage only in Milwaukee!  Based on where I'm from I got both sides of both of those issues--I'm bi-lingual!

Love the "y'all" divide in the country!

And it's true, I never did figure out "crayfish/crawfish".  I don't know what to call those things!