Going from Lao to Latvian (LatvieΕ‘u) has a composite linguistic distance of 85% (heuristic estimate). Below is the dimension-by-dimension breakdown.
Shared vocabulary, cognates, and loanwords.
Morphology, syntax, word order, cases.
Shared sounds and phoneme inventory.
Lao β Latin
Tai-Kadai β Indo-European
The 5 languages with the lowest linguistic distance from Lao:
A quick 3-question check between Lao and Latvian. No signup.