Lachoudisch was a dialect of German, containing many Hebrew and Yiddish words, native to the Bavarian town of Schopfloch.
Lachoudisch formed in the 16th century as Jewish citizens found it convenient to trade secrets in a language non-Jews could not understand.
The language spread within the community and eventually some non-Jews knew it too.
As the Jewish community of Schopfloch mostly emigrated abroad and the remained were eradicated by 1939, the language entered serious decline, and eventually went extinct.
[2] Lachoudisch contained several Hebrew and Yiddish loanwords many of which reflected the Jewish community's hostility to Christianity and government authority.