YOU SAID:
I love your dress its prettier than mine
INTO JAPANESE
あなたのドレスが大好きです、私よりもかわいいです
BACK INTO ENGLISH
I love your dress, it's cuter than mine
INTO JAPANESE
あなたのドレスが大好きです、私のドレスよりもかわいいです
BACK INTO ENGLISH
I love your dress, it's cuter than mine
That didn't even make that much sense in English.