If you are in a search of a Nation were no one speaks English you should make your own and live there with no much company, no internet, no radio, no TV. I don't see other ways. Too much sorry I could not be your guest, as I only know English (and Italian).

Yes, it would be hard for you to find a country where people didn't speak at least a little english.

Certainly

It depends on where you live, in Latin America, the Spanish is more popular and important than the English. :)