Going from Thai to Mongolian (ΠΠΎΠ½Π³ΠΎΠ») has a composite linguistic distance of 91% (heuristic estimate). Below is the dimension-by-dimension breakdown.
Shared vocabulary, cognates, and loanwords.
Morphology, syntax, word order, cases.
Shared sounds and phoneme inventory.
Thai β Cyrillic
Tai-Kadai β Mongolic
The 5 languages with the lowest linguistic distance from Thai:
A quick 3-question check between Thai and Mongolian. No signup.