Going from Hindi to Nepali (เคจเฅเคชเคพเคฒเฅ) has a composite linguistic distance of 25% (curated lexical data). Below is the dimension-by-dimension breakdown.
Shared vocabulary, cognates, and loanwords.
Morphology, syntax, word order, cases.
Shared sounds and phoneme inventory.
Devanagari โ Devanagari
Indo-European โ Indo-European
The 5 languages with the lowest linguistic distance from Hindi:
A quick 3-question check between Hindi and Nepali. No signup.