Speak Yiddish!
On a bus in Tel Aviv, a mother was talking animatedly, in Yiddish, to
her little boy - who kept answering her in Hebrew. And each time the
mother said, "No, no, talk Yiddish!"
An inpatient Israeli, overhearing this, exclaimed, "Lady, why do you
insist the boy talk Yiddish instead of Hebrew?"
Replied the mother, "I don't want him to forget he's a Jew."