From the Elvish language Tolkien invented for denizens of Middle Earth to the science fiction lingo spoken by the Klingons in Star Trek , writers have always endeavored to create new forms of expression, not only in the English language, but in languages that exist only in their own imaginations. Now, in From Elvish to Klingon: Exploring Invented Languages , a group of leading linguists offers a lively investigation of all manner of invented languages...