Please help!

I have been using this app for about a week now. And i think its really great. But there's one HUGE issue. I live in south korea. So I need to get my coupons in korean won or else they'll be worthless. But in the language settings, there's only canada and USA. I don't know why it dosen't work since all my korean friends have this app as well and THEY get there coupons in korean won. Please help me. I am desperate.