Probably any country in the world where English is not the de facto language--once you get 100 km. away from the major and mid-sized cities. For example, 35% of Guatemalans do not speak Spanish. (Their native language is one of about twenty Amerindian languages). I imagine that those who do not speak Spanish do not speak English, either. (And now I am thinking of the Netherlands, where seemingly everyone does speak English... but then, I wonder whether there is any place in the Netherlands that is more than 100 km. from a city!) In the United States, most big cities have ethnic enclaves, and within those enclaves many people do not speak English, particularly older people. It is estimated that 10% of US citizens do not speak "fluent English," for example. Approximately 14% of the world's population has had no formal education at all. I would guess that most people with no formal education speak only the dominant local language.