The feature helps users find country specific results in a way that works (gives results) and is quick (helps user to avoid extra manual steps).
I'll start with a specific use case that probably can be generalized.
When I search for something in Sweden I have to manually translate my search string into Swedish. It'd be nice to have a some kind of checkbox to auto-translate it for the selected country.
The problem is there are countries with multiple official languages. So, more advanced option would be a drop down or multi select with a list of languages actually used in the country.
