Matras, Yaron. "Archive of Endangered and Smaller Languages: Yiddish 8 Ağustos 2020 tarihinde Wayback Machine sitesinde arşivlendi.". University of Manchester. humanities.manchester.ac.uk. Matres explains that with the emigration of Jews eastward into Slavic-speaking areas of Central Europe, from around the twelfth century onward, Yiddish "took on an independent development path", adding: "It was only in this context that Jews began to refer to their language as 'Yiddish' (= 'Jewish'), while earlier, it had been referred to as 'Yiddish-Taitsh' (='Judeo-German')."
Matras, Yaron. "Archive of Endangered and Smaller Languages: Yiddish 8 Ağustos 2020 tarihinde Wayback Machine sitesinde arşivlendi.". University of Manchester. humanities.manchester.ac.uk. Matres explains that with the emigration of Jews eastward into Slavic-speaking areas of Central Europe, from around the twelfth century onward, Yiddish "took on an independent development path", adding: "It was only in this context that Jews began to refer to their language as 'Yiddish' (= 'Jewish'), while earlier, it had been referred to as 'Yiddish-Taitsh' (='Judeo-German')."