YOU SAID:
I don't care who the father is. I'm the grandfather!
INTO JAPANESE
私は父が誰であるかを気にしません。私は祖父です!
BACK INTO ENGLISH
I don't care who my father is. I'm my grandfather!
INTO JAPANESE
私は私の父が誰であるかを気にしません。私は祖父です!
BACK INTO ENGLISH
I don't care who my father is. I'm my grandfather!
That didn't even make that much sense in English.