Yiddish

Yiddish dialects are varieties of the Yiddish language and are divided according to the region in Europe where each developed its distinctiveness. Linguistically, Yiddish is divided in distinct Eastern and Western dialects. While the Western dialects mostly died out in the 19th century due to Jewish language assimilation into mainstream culture, the Eastern dialects were very vital until most of Eastern European Jewry was destroyed in the Holocaust, called the Khurbn in Yiddish.

The Northeastern dialects of Eastern Yiddish were dominant in 20th-century Yiddish culture and academia. By the 21st century, the Southern dialects of Yiddish that are preserved in many conservative Hasidic communities have remained to become the most commonly spoken form of Yiddish.

From Wikipedia · Yiddish dialects · CC BY-SA 4.0