The Secret Code That Threatened Nazi Fantasies of Racial Purity

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Martin Puchner’s “The Language of Thieves” recounts the history of Rotwelsch — a secret code used by vagabonds across Europe for centuries — and the efforts to stamp it out.

via NYT > Books https://www.nytimes.com/2020/10/13/books/review/the-language-of-thieves-martin-puchner.html