Have you ever visited another part of the country and heard the locals use words unfamiliar to you? In some regions, people refer to a carbonated beverage as “soda,” while it’s “pop” in other parts. In Pittsburgh, “yinz” is slang for “you ones” or you people. The New York Times’  Josh Katz created a compendium of these colloquialisms in his book, Speaking American: How Y’all, Youse, and You Guys Talk.   Katz, a statistician and graphics editor at the paper , based his book on a wildly popular interactive dialect quiz he created in 2013. He and Naomi Baron, a professor of linguistics and executive director at the Center for Teaching, Research and Learning at American University in Washington, D.C., discussed why people from various regions speak differently on the Knowledge at Wharton Show on Sirius XM channel 111 . An edited transcript of the conversation follows. Knowledge at Wharton: What got you thinking about this topic for a book?…