Winnie, many non-Jews have been fluent in Yiddish. James Cagney picked it up as a boy on the Lower East Side – and used it in two of his movies. Colin Powell learned it working for Jews. An immigrant from Russia once told me that when her mother was sitting in a park the Arab caretaker addressed her in Yiddish. He had worked for Jews as a boy in the Old city of Jerusalem.
Tie, kol hasoneh halachot kol yom. BTW, some Sephardic groups also had this pronunciation. Apparently it was widespread in ancient times as it passed into Ancient Greek (sabbaton), Latin (sabbatum), English (sabbath and sabbatical), Spanish and Italian (sabato) and Russian (subbota).