YOU SAID:
if you have nothing nice to say, then don't say anything
INTO JAPANESE
あなたが何も言いたくない場合は、何も言わないでください
BACK INTO ENGLISH
If you do not want to say anything, please do not say anything
INTO JAPANESE
何も言いたくない場合は、何も言わないでください
BACK INTO ENGLISH
If you do not want to say anything, please do not say anything
That didn't even make that much sense in English.