Was in Japan so long, I almost learn to speak, had to leave
Back to the hood, where they don't understand unless you speaking trapanese

from Big Sean (Ft. James Fauntleroy & Nicole Lequerica) – Fire Lyrics on Rap Genius

Meaning

Sean was touring in Japan for a long time, almost enough to speak the language, i.e, Japanese

Note the implied rhyme here with “Japanese” — a word Sean never actually says in the line

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