EN
The article deals with the development, task and function of Yiddish, the language of the Jews in Central and Eastern Europe. In this article, the author deals with the development and development of the phenomenon of Yiddish in the German and Slovak linguistic environment. She analyses the possibility or impossibility of classifying Yiddish into the stratification model of the two languages from the diachronic as well as the synchronous view. The presented analysis presents the historical development of Yiddish from a colloquial-language variety of German to the existence as a self-contained language with all linguistic functions. The attempt to classify Yiddish into the stratification model of the Slovak language has not succeeded, so she is of the opinion that Yiddish in Slovakia exists in the form of a self-reliant language - the East Yiddish. The attempt to classify Yiddish into the stratification model of the German language confirmed the necessity of temporal differentiation (from the diachronic point of view the Yiddish was "only" a colloquial language of the German language, the synchronous view is an independent language).