Going from Tamil to Tibetan (เฝเฝผเฝเผเฝฆเพเฝเผ) 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.
Tamil โ Tibetan
Dravidian โ Sino-Tibetan
The 5 languages with the lowest linguistic distance from Tamil:
A quick 3-question check between Tamil and Tibetan. No signup.