A "foreign country" is any country that's outside of the one that you're talking about.

That might mean:

• a country that you were not born in
• a country that you do not live in
• a country that's not the main topic of discussion

For example, if you were born in Korea and you recently moved to Canada, you can say this about Canada:

It's hard living in a foreign country.

But if you're talking to other Canadians, you can also say:

I was born in a foreign country.