Going from Yoruba to Indonesian (Bahasa Indonesia) has a composite linguistic distance of 76% (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 → Latin
Niger-Congo ↔ Austronesian
The 5 languages with the lowest linguistic distance from Yoruba:
A quick 3-question check between Yoruba and Indonesian. No signup.