Going from Bengali to Burmese (แแผแแบแแฌแแฌแแฌ) 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.
Bengali โ Burmese
Indo-European โ Sino-Tibetan
The 5 languages with the lowest linguistic distance from Bengali:
A quick 3-question check between Bengali and Burmese. No signup.