Lachoudisch was a dialect of German, containing many Hebrew and Yiddish words, native to the Bavarian town of Schopfloch. It was created in the sixteenth century. Few speakers remained after the Holocaust, and it went extinct sometime after.

Lachoudisch formed in the 16th century, developing as an argot among several Jewish citizens who found it convenient to trade secrets in a language that 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.

Lachoudisch contained several Hebrew and Yiddish loanwords, many of which reflected the Jewish community's hostility to Christianity and government authority.