YOU SAID:

don't do that, stupid.

INTO JAPANESE

しないように愚かな。

BACK INTO ENGLISH

Not so silly.

INTO JAPANESE

とても愚かではないです。

BACK INTO ENGLISH

It is not very stupid.

INTO JAPANESE

それはあまり愚かではない。

BACK INTO ENGLISH

It isn't too stupid.

INTO JAPANESE

そうではない

BACK INTO ENGLISH

But it doesn't.

INTO JAPANESE

そうではない

BACK INTO ENGLISH

But it doesn't.