YOU SAID:
I can’t believe you’re a fake turtle my dude
INTO JAPANESE
あなたが私のカメだとは信じられない
BACK INTO ENGLISH
I can't believe you are my turtle
INTO JAPANESE
あなたが私のカメだとは信じられません
BACK INTO ENGLISH
I can't believe you are my turtle
That didn't even make that much sense in English.