If "Jewish" people were the real Jews (Tribe of Judah), why then do they speak Yiddish, which is a mixture of German, Dutch, English, Hebrew, Scottish, etc., and not maintain the original Hebrew?

 The history of Jewish languages is complex, and it's important to understand that there isn't a single, monolithic Jewish identity or linguistic tradition. Jewish communities have existed in various parts of the world over the centuries, and they have often adopted and adapted the languages of the regions in which they lived.

Yiddish is a High German-derived language historically spoken by Ashkenazi Jews. It developed in Central and Eastern Europe, primarily among Jewish communities in Germany and later in areas such as Poland and Russia. Yiddish is written using the Hebrew script and incorporates many Hebrew and Aramaic words, but it also includes vocabulary from Slavic and Romance languages, as well as elements of Germanic languages.

The choice of language among Jewish communities was influenced by historical, geographical, and social factors. As Jews migrated and settled in different regions, they often adopted the local language for everyday communication while maintaining Hebrew for religious and scholarly purposes.

The dispersion of Jewish communities across the globe has resulted in a diversity of languages spoken by Jews. For example, Sephardic Jews, who have historical ties to the Iberian Peninsula, may speak Ladino, a language with roots in medieval Spanish and incorporating Hebrew and other elements.

Modern Hebrew, as spoken in Israel today, is a revival of the ancient Hebrew language for daily communication. It was a deliberate effort in the late 19th and early 20th centuries to restore Hebrew as a spoken language, and it serves as the official language of the State of Israel.

In summary, the linguistic diversity among Jewish communities reflects the historical and geographical dispersion of the Jewish people, with various communities adopting and adapting languages based on their surroundings. Yiddish is just one example of this linguistic diversity among Jewish groups.