yes, most universities in decent European countries (read Germany, Netherlands, Scandinavia) will hire you even if you only speak English but with the expectation that you will learn the language. So you have to take language classes for like 3 years. I think they probably still keep you even if you're shit at the language after 3 years though.
Asian countries like Japan, SK and China will also hire English-only speaking staff.
How easy it is varies from field to field though obviously.