YOU SAID:
what's the matter, peanut butter?
INTO JAPANESE
どうしたの、ピーナッツバター?
BACK INTO ENGLISH
What's wrong with peanut butter?
INTO JAPANESE
ピーナッツバターの何が問題になっていますか?
BACK INTO ENGLISH
What's wrong with peanut butter?
That didn't even make that much sense in English.