He is only in the country temporarily and should be naturally curious to try foreign thing,
She probably will try out the local cuisine, but she was enquiring where to buy Asian ingredients to cook with. I'll give you a clue. She is a student and generally speaking most students are not that well off, so I doubt she will be eating out all the time and will be cooking at home. What do you expect her to cook, gołąbki, when she is from Vietnam? She is going to cook food that she is familiar with and knows how to make.
we are curious about different things other cultures have to offer
Not when it comes to food they're not. I have never known a Pole to cook anything other than Polish food at home, and I've eaten at enough friends' houses to know this to be the case. They generally don't tend to eat out as much as English people would either.
looking only for cheapest clothes for fear of having to spend a penny
She didn't say that she was looking for the cheapest clothes, but would you really expect a student on a budget to be out looking for designer jeans?
We have Americans and Europeans from Western Europe shopping here in the cheapest chops imaginable
Being down under, I'm wondering how you would know that as you don't even live in Poland.