YOU SAID:

Don't forget to tell him that he is incredibly stupid.

INTO JAPANESE

彼が信じられないほど馬鹿だと彼に言うことを忘れないでください。

BACK INTO ENGLISH

Do not forget to tell him he is incredibly stupid.

INTO JAPANESE

彼が信じられないほど馬鹿だと彼に言うことを忘れないでください。

BACK INTO ENGLISH

Do not forget to tell him he is incredibly stupid.