gabie, many are almost completely ignorant of this cholent, known as Yiddish, of High German, Polish and, lihavdil, Lashon HaKodesh. While those who speak Yiddish SHOULD be at least passably fluent in English, to the point that is a speaker speaks in English, or at least English with some Yiddish mixed in, everyone should be able to understand.
There is little reason this “language” of Yiddish exists, other than for historical purposes and communicating with those of previous generations who speak it better than the native language.
There already is a new Yiddish that should take over the function Yiddish served, and that is Yeshivish English. Since English is an international language and everyone learns Talmud Bavli, you now have a perfect international Jewish language.