You know how there’s an Arabic language and then many languages that are different but use the Arabic alphabet?
Yiddish uses Hebrew but it’s a European language which varies depending on the country you come from. Some uses an older German, others use Russian. Ladino is another language that used Hebrew letters but was basically Spanish
https://www.diffen.com/difference/Hebrew_vs_Yiddish
https://en.m.wikipedia.org/wiki/Judaeo-Spanish