YOU SAID:
My cookie has been eaten!
INTO JAPANESE
私のクッキーが食べられました!
BACK INTO ENGLISH
I ate my cookie!
INTO JAPANESE
クッキーを食べました!
BACK INTO ENGLISH
I ate a cookie!
INTO JAPANESE
クッキー食べました!
BACK INTO ENGLISH
I ate cookies!
INTO JAPANESE
クッキー食べました!
BACK INTO ENGLISH
I ate cookies!
That didn't even make that much sense in English.