What is the history of the Yiddish language?

The Yiddish language continued to develop and diversify according to regional dialects, such as Western and Eastern Yiddish. Western Yiddish was prevalent in Western and Central Europe, while Eastern Yiddish became dominant in Eastern Europe, particularly in areas with significant Jewish populations, such as Poland, Lithuania, Ukraine, and Belarus. Eastern Yiddish further diversified into Northern (Litvish), Central (Polish), and Southern (Ukrainian) varieties.