Importance. Spontaneous public speech has become a modern reality in just over a decade, which explains the insufficient study of this phenomenon and determines the novelty of this study at the current stage of linguistic development. The characteristic of the concept of “linguistic error” using the example of the French language, highlighting the significance of this work in the contemporary intercultural space is given. Research methods. This study describes and analyzes in detail examples of errors, selected using a continuous sampling method from the written public speech of French political figures. The material is based on online resources that provide access to the written public speeches of French politicians and studies conducted in this area by major French print media outlets such as Le Figaro, Le Monde, RTL, and others. Results and Discussion. The research discusses the definitions of linguistic norms, analyzes and identifies the main types of language errors in the written public speech of political figures of the modern French Republic, provides justifications from the point of view of linguistic (the main trends in the development of the language) and extralinguistic factors, which is necessary for understanding the vectors of development of the modern French language, its current normative status and the rules of communication. Conclusion. The appearance of spelling, grammatical and lexical errors in the written speech of politicians may indicate a tolerant attitude of modern French society towards such errors due to their frequency, which allows us to discuss the direction of development of the French language, which, under the influence of English, is beginning to show a tendency towards simplification.