YOU SAID:
If you can't say anything nice
INTO JAPANESE
あなたが素敵なことを言うことができないならば
BACK INTO ENGLISH
If you can not say nice things
INTO JAPANESE
いいことが言えない場合
BACK INTO ENGLISH
If you can not say good things
INTO JAPANESE
あなたが良いことを言うことができないならば
BACK INTO ENGLISH
If you can not say good things
Come on, you can do better than that.