Yiddish is a West Germanic language spoken by 2 million people. In fact, it is phonetically closest to Middle High German. About three-quarters of the Yiddish vocabulary is taken from German, although some meanings are different.
It is commonly spoken by people of Jewish heritage originating from Central and Eastern Europe and now settled in various parts of the world such as the USA, Israel and Russia. In Sweden, Yiddish is the official minority language.