Why doesn't firoozeh do more to encourage her parents to learn English ?

“I’ve no longer encouraged my parents to learn English. I’ve given up...now, when my mother wants to ask the grocer whether he has any more eggplants in the back that are a little darker and more firm...she can do so in Persian, all by herself."

Firoozeh has given up on encouraging her parents to learn English because over the years more and more Iranian supermarkets, television, and newspapers took root in America. Her parents have learned to communicate in their own way..... so she's happy with that.