The parents of Cyrilla Boyer (left) and Paternilla Pratt spoke pawpaw French fluently, but the sisters never learned the language. Teachers in the 1920s and 1930s would discipline kids for speaking French. Jacob McCleland/KRCU hide caption

itoggle caption Jacob McCleland/KRCU

Where In the U.S. do people say pee-kahn over pi-kahn? Joshua Katz answered your burning question by mapping Bert Vaux's dialect survey on regional variations in the continental United States. Courtesy of Joshua Katz hide caption

itoggle caption Courtesy of Joshua Katz