YOU SAID:

Hey my sister is very cool

INTO JAPANESE

ねえ、私の妹はとてもクールだ

BACK INTO ENGLISH

Hey, my sister is very cool

INTO JAPANESE

ねえ、私の妹はとても冷静です

BACK INTO ENGLISH

Hey, my younger sister is very cool

INTO JAPANESE

ねえ、私の妹はとてもクールだ

BACK INTO ENGLISH

Hey, my sister is very cool

INTO JAPANESE

ねえ、私の妹はとても冷静です

BACK INTO ENGLISH

Hey, my younger sister is very cool