YOU SAID:

I solemnly solemnly swear that I am up to no good.

INTO JAPANESE

私は厳粛に私はダメまでであることを誓います。

BACK INTO ENGLISH

I solemnly swear that I am no good.

INTO JAPANESE

私はダメであることを厳粛に誓います。

BACK INTO ENGLISH

I solemnly swear that I am no good.