Going from Yiddish to Uyghur (ئۇيغۇرچە) has a composite linguistic distance of 93% (heuristic estimate). Below is the dimension-by-dimension breakdown.
Shared vocabulary, cognates, and loanwords.
Morphology, syntax, word order, cases.
Shared sounds and phoneme inventory.
Hebrew → Arabic
Indo-European ↔ Turkic
The 5 languages with the lowest linguistic distance from Yiddish:
A quick 3-question check between Yiddish and Uyghur. No signup.