Going from Belarusian to Kyrgyz (ΠΡΡΠ³ΡΠ·ΡΠ°) 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.
Cyrillic β Cyrillic
Indo-European β Turkic
The 5 languages with the lowest linguistic distance from Belarusian:
A quick 3-question check between Belarusian and Kyrgyz. No signup.