In the context of globalization and labour mobility, it has become a habit for teams to be made up of members from different countries, speaking different languages and having an inhomogeneous cultural background. For a basic communication to achieve professional goals, a common code is usually established. However, we find that the efficiency of communication and implicitly of the work results involves the knowledge of several foreign languages. In this paper we aim to emphasise how important it is for economics students to learn different foreign languages, to assimilate and master business language. Thus, they will be able to communicate easily in a professional environment and to develop at a brisk pace in order to reach the top of the company. The ability to interact with a teammate in the language s/he has mastered since childhood leads to increased trust and better group homogeneity, which results in the optimization of teamwork.