Literary historian Martin Puchner’s journey with languages started early and unexpectedly: a series of seemingly unconnected events led to his discovery that he was the last speaker of an almost forgotten medieval language, Rotwelsch. In his research into what this language was — where it came from, who spoke it, and why — Puchner was forced to confront the good and the bad in his own family’s history and how he would choose to inherit the Rotwelsch legacy.