nkg

@Michael Some (not all) dictionaries list "bahts" as an alternative to "baht", but it seems ridiculous to me. The English language has no trouble treating "yen" as both singular and plural, presumably because that was how the Japanese themselves used the word.

@CB The Cambridge dictionary lists it as baht, plural baht. The word "bahts" might exist in some dictionaries, but there is no situation where saying "bahts" would be preferable to "baht".