Did the Jews speak German?
Jews in Germany and Austria, before WW2, spoke German. Most Jews
in other parts of Central and Eastern Europe, and some in Western
Europe as well, spoke Yiddish, a language derived from an older
form of German, with many Hebrew and Slavic loan words. German is
written in a variant of the Latin Alphabet. Yiddish is written in
the Hebrew Alphabet.
Many Jews living in other parts of the world, who had migrated
from central and Eastern Europe, also spoke German or Yiddish as
well as the languages of their new countries.
On the other hand, Jews with long roots outside that region did
not speak Yiddish. Jews in the Mediterranean world descended from
the Spanish expulsion in 1492 often spoke, and still speak, an old
form of Spanish written with Hebrew characters called Ladino. And
Jews in the Arab lands had Arabic, sometimes written with Hebrew
characters.