Going from Quechua to Mongolian (ΠΠΎΠ½Π³ΠΎΠ») has a composite linguistic distance of 83% (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 β Cyrillic
Quechuan β Mongolic
The 5 languages with the lowest linguistic distance from Quechua:
A quick 3-question check between Quechua and Mongolian. No signup.