When it comes to European citizenship and intercultural values education (critical thinking, curiosity, respect, solidarity and others), construction of communicative skills is often cited as a value that should be developed. It means to let students have access to a plurality of codes, often contradictory and to read them. However, developing of communicative skills at school should be aware of the existence of parallel ways in which these skills are being developed every day, spontaneously and often in a very particular way. The paper shows some of the specificities of computer-mediated communication, a tool which shapes communication in today’s world, created communicative habits which are relatively strong and and marks linguistic behaviour of speakers in general.