I suppose it depends on where you are in another country.
If you stick to the tourist areas and stay out of trouble, then usually the staff will know english, or some of the staff will know enough english. It's their job after all.
If you're dealing with the business community, or anything relatively high level, in terms of politics, government or professional conduct, most people won't speak English. But you should be able to find someone who does who can take care of you.
If you have to deal with the police, with security forces, soldiers, or anything like that, you're screwed. They won't speak English. There won't be anyone around who will speak English. You're taking your chances.
If you're in the countryside, in villages or small towns, or even medium sized towns, if you're in urban residential neighborhoods, local shopping districts, etc., in short, if you go 100 yards from the Holiday Inn, your chances of finding English speakers drops dramatically.