Going from Hausa to Yiddish (ייִדיש) has a composite linguistic distance of 80% (heuristic estimate). Below is the dimension-by-dimension breakdown.
Shared vocabulary, cognates, and loanwords.
Morphology, syntax, word order, cases.
Shared sounds and phoneme inventory.
Latin/Arabic → Hebrew
Afro-Asiatic ↔ Indo-European
The 5 languages with the lowest linguistic distance from Hausa:
A quick 3-question check between Hausa and Yiddish. No signup.