Going from Armenian to Korean (한국어) has a composite linguistic distance of 79% (heuristic estimate). Below is the dimension-by-dimension breakdown.
Shared vocabulary, cognates, and loanwords.
Morphology, syntax, word order, cases.
Shared sounds and phoneme inventory.
Armenian → Hangul
Indo-European ↔ Koreanic
The 5 languages with the lowest linguistic distance from Armenian:
A quick 3-question check between Armenian and Korean. No signup.