The study of language is fascinating for a number of reasons. First of all, human languages are intimately connected to the knowledge of the world and to our living in the world. We are able to talk about the things we can touch, about things that happen, about our emotions, desires, sensations. Second, there are plenty of languages, each with their specific features, but all with a universal common basis. Third, language can be, and has been, studied from many perspectives, ranging from linguistics proper to psychology, from mathematics to philosophy, from computer science to biology. Finally, language has a lot of interesting and economically promising applications.