Headcanon: Yellow's about 1/16th Japanese since Primrose was an immigrant from a marker edition Japan. His parents did teach him how to speak Japanese properly even tho he can't read or write it 👍👍👍

Here's a lil incorrect quote like thing just because I think it matches perfectly

~

Player: SAYONARA!!!

Yellow: ...what?

Player: I'm Japanese now :D

Yellow: That is not Japanese, Player. That is American slang.

Yellow: It's さようなら, not whatever that shit was.