YOU SAID:
Happy girls are the prettiest
INTO JAPANESE
幸せな女の子たちが一番可愛い
BACK INTO ENGLISH
Happy girls are the cutest
INTO JAPANESE
幸せな女の子はかわいい
BACK INTO ENGLISH
Happy girl is cute
INTO JAPANESE
幸せな女の子はかわいい
BACK INTO ENGLISH
Happy girl is cute
That didn't even make that much sense in English.