Everyone in the World Should Speak the Same Language

Everyone in the world should speak the same language. I suppose it is a rhetoric question. Ages and ages hence people had had one common language, however, we all know what the consequences were. This situation can be observed from several points of view.
There are some arguments to support this idea. Firstly, people would have fewer examinations, which is rather nice. You could pay more attention to other subjects, which you consider more useful.…