YOU SAID:

Pizza is yum but yum isn't pizza

INTO JAPANESE

ピザは yum が、yum のピザではないです。

BACK INTO ENGLISH

Is not pizza is pizza yum yum.

INTO JAPANESE

ピザがピザ ヤムヤムはありません。

BACK INTO ENGLISH

Pizza Pizza yum yum.

INTO JAPANESE

ピザ ピザ ヤムヤム。

BACK INTO ENGLISH

Pizza Pizza yum yum.