I don't speak Japanese

Informal form of 話 (hanashi).

continuative of 話す

the Japanese language

(transitive) to talk (about something); to speak (on a subject); to converse / to speak (a language)

(chiefly women's speech) first person singular pronoun: I, me

private; mine

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness

a personal or private matter / selfishness / privacy, secrecy / (women's speech, obsolete) a brother-in-law