YOU SAID:

Once a fool always a fool

INTO JAPANESE

一度ばかはいつもばか

BACK INTO ENGLISH

once a fool is always a fool

INTO JAPANESE

一度ばかはいつもばかだ

BACK INTO ENGLISH

A fool is always a fool

INTO JAPANESE

バカはいつまでもバカ

BACK INTO ENGLISH

stupid will always be stupid

INTO JAPANESE

バカはいつまでもバカ

BACK INTO ENGLISH

stupid will always be stupid