Going from Czech to Thai (เธ เธฒเธฉเธฒเนเธเธข) has a composite linguistic distance of 84% (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 โ Thai
Indo-European โ Tai-Kadai
The 5 languages with the lowest linguistic distance from Czech:
A quick 3-question check between Czech and Thai. No signup.