https://www.atlasobscura.com/articles/the-long-quest-to-find-ashkenaz-the-birthplace-of-yiddish
Link to Atlas Obscura article
Also the Arabic language of some Muslims and Aramaic language of Syrian Palestinian Christians from certain denominations is closer to ancient Hebrew than Yiddish that many Ashkenazi Jews use which is basicly German using a font called Hebrew that is not the original ancient Hebrew font