Going from Pashto to Yiddish (ייִדיש) has a composite linguistic distance of 71% (heuristic estimate). Below is the dimension-by-dimension breakdown.
Shared vocabulary, cognates, and loanwords.
Morphology, syntax, word order, cases.
Shared sounds and phoneme inventory.
Arabic → Hebrew
Indo-European ↔ Indo-European
The 5 languages with the lowest linguistic distance from Pashto:
A quick 3-question check between Pashto and Yiddish. No signup.