YOU SAID:
pineapples are good on pizza
INTO JAPANESE
パイナップルは、ピザで良い
BACK INTO ENGLISH
Pineapple is a good pizza
INTO JAPANESE
パイナップルが良いピザです。
BACK INTO ENGLISH
Is pineapple good pizza.
INTO JAPANESE
パイナップルの良いピザです。
BACK INTO ENGLISH
Is pineapple good pizza.
That didn't even make that much sense in English.