YOU SAID:

If you can't say anything nice do not say anything at all

INTO JAPANESE

いいことを言えないなら、何も言わないで

BACK INTO ENGLISH

If you can't say good things, don't say anything

INTO JAPANESE

良いことを言えないなら、何も言わないでください

BACK INTO ENGLISH

If you can't say good things, don't say anything