YOU SAID:
Pineapple should be on pizza.
INTO JAPANESE
パイナップルはピザの上に置いてください。
BACK INTO ENGLISH
Place the pineapple on the pizza.
INTO JAPANESE
パイナップルをピザの上に置きます。
BACK INTO ENGLISH
Place the pineapple on the pizza.
That didn't even make that much sense in English.