YOU SAID:

I solemnly swear that I am up to no good.

INTO JAPANESE

私はよからぬことを誓います。

BACK INTO ENGLISH

I solemnly swear.

INTO JAPANESE

私は厳粛に誓います。

BACK INTO ENGLISH

I do solemnly swear.

INTO JAPANESE

厳粛に誓います。

BACK INTO ENGLISH

Do solemnly swear.

INTO JAPANESE

厳粛に誓います。

BACK INTO ENGLISH

Do solemnly swear.