Jewish Synagogue in Sarajevo. The original Jewish people in Sarajevo were from Spain and spoke Ladino, not Yiddish.
Excerpts of an article on the Jewish population in Sarajevo.
Sephardic refugees from Spain were the first Jews in Sarajevo, having been expelled along with Muslims and other non-Catholics in 1492. When the Austro-Hungarian Empire expanded, Yiddish-speaking Ashkenazi Jews entered the community.
At the end of World War I, Sarajevo was home to more than 12,000 Jews, who made up one-fifth of the city’s population. Nearly all of them were murdered during the Holocaust. When war came to Sarajevo again in 1992, hundreds fled for Israel, Spain and other countries.
Sarajevo’s Jewish community is a mix of traditions, with a distinct Spanish flair that lived on over the centuries. (A person named) Debevec, who stayed in Sarajevo and volunteered during the siege from 1992 to 1996 siege, is one of only a handful of community members who still speak some Ladino, the medieval Spanish-Hebrew language traditionally spoken by Sephardic Jews. Yiddish, the German-Hebrew-Slavic language spoken by Ashkenazi Jews, has ceased to exist in Sarajevo, she said.
Today, there are about 700 members of the community. The Sephardic and Ashkenazi Jews used to worship separately; today they pray together, following Sephardic traditions in the Ashkenazi synagogue.