The spoken language has not always been a priority for linguists, as it is too dynamic and permissive, and the issues connected to its inner delimitations are complex, the boundaries being very "fragile" and even uncertain. For example, some researchers consider the spoken language as being colloquial, familiar or regional, whereas we distinguish two main aspects: standard and substandard spoken language, that both have well-defined features. In this article we try to delimit stylistically the spoken language from the written discourse, pointing out that, ultimately, the two stylistic (oral / written) registers are approaching more and more despite of the speakers' massive access to information, of the unprecedented diversification of the means of communication.