Why would someone set out to invent a new language? From 12th Century Lingua Ignota to the chipmunk noise-based Dritok, we’ll explore a few of the almost 900 created tongues with linguist Arika Okrent, author of the new book “In the Land of Invented Languages: Esperanto Rock Stars, Klingon Poets, Loglan Lovers, and the Mad Dreamers Who Tried to Build A Perfect Language” (Spiegel and Grau, 2009).