Ok but if for example you want to learn Russian or Chinese from a native speaker you can hardly employ an EU citizen to do that as neither Russia nor China are anywhere near to be a part of EU, what will you do? And does that means we cannot have - say an American professor of Physics for example teaching us new technologies? It is not only a matter of language teaching, but education in general. This rule if applied for general job openings should not include such fields as: education, science, sport and medicine! And there should be a difference in employment in private and in state institutions IMO.