According to the Heideggerian argumentation, it is indeed by the speech or the word that the being expresses itself and exposes itself. This conception is made more beautiful by the philosophy of language which postulates that it is by, in and thanks to the articulated language (the word) that the human person reveals or defines himself.Thus, making our own this way of thinking, our dissertation proposes to reflect on the binomial Language and Humanity. From this binomial, we detect very quickly that it is in its expression that the human person reveals himself. It is incumbent upon him, then, to take care of what he says because his image as well as his being depend on it.Moreover, considering that words are like weapons that can kill, their choice must therefore be wise, conscious and consequent. All the more so as the word spoken engages and defines one's own humanity. What to say? Why say it? When to say it? How to say it? Where to say it? are the questions that can lead the reader to savor the fruit of our meager research.