How a secret European language ‘made a rabbit’ and survived

'Rotwelsch' was the name it was given — a tongue created by outcasts, for outcasts. Martin Puchner presents us with an interesting question. How much do we know about 'underground life' in Europe between the Middles Ages and the modern era? Here, he focuses on one particular aspect that may offer us some answers: the language used by travellers and outlaws at the time which, somewhat ironically, managed to survive through police documentation.