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How easy is Japanese for Thai speakers?

Going from Thai to Japanese (日本語) has a composite linguistic distance of 84% (heuristic estimate). Below is the dimension-by-dimension breakdown.

84% distance FSI Cat IV (Hardest) — ~2,200 hours
Lexical similarity
3%

Shared vocabulary, cognates, and loanwords.

Grammatical distance
50%

Morphology, syntax, word order, cases.

Phonological similarity
20%

Shared sounds and phoneme inventory.

Writing-system match
0%

Thai → Japanese

Genealogical kinship
0%

Tai-Kadai ↔ Japonic

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Other easy languages for Thai speakers

The 5 languages with the lowest linguistic distance from Thai:

Think you can tell them apart?

A quick 3-question check between Thai and Japanese. No signup.