YOU SAID:

That which does not kill me, only makes me stronger.

INTO JAPANESE

私を殺さないものは、私を強くするだけです。

BACK INTO ENGLISH

What does not kill me just makes me strong.

INTO JAPANESE

私を殺さないものは、私を強くします。

BACK INTO ENGLISH

Those that do not kill me will make me strong.

INTO JAPANESE

私を殺さない人は私を強くします。

BACK INTO ENGLISH

Those who do not kill me will strengthen me.

INTO JAPANESE

私を殺さない者は私を強めるでしょう。

BACK INTO ENGLISH

Those who do not kill me will strengthen me.