YOU SAID:

Dad is a really stupid person

INTO JAPANESE

お父さんは本当に愚かな人

BACK INTO ENGLISH

Dad is really stupid.

INTO JAPANESE

お父さんは本当に愚かです。

BACK INTO ENGLISH

Dad is silly really.

INTO JAPANESE

お父さん、本当に愚かです。

BACK INTO ENGLISH

Dad, is really stupid.

INTO JAPANESE

お父さん、本当に愚かです。

BACK INTO ENGLISH

Dad, is really stupid.