The article describes the current tendency and challenges of philological characteristics of French the French popular language. The types of French sleng are marked out, indicating the linguistic units with the national cultural specific and information of lingvo-socio-cultural features of speech and nonlanguage behavior. The article observes and describes the expressive tools of the French language. There is the description of a cultural component of the process of studying and learning French from the perspective of intercultural communication.
By the example of the lexico-semantic group 'Stock market goods, their lists, properties, stock exchange documents and rules' the author shows the origin of traders' slang words and expressions and the structural, derivational and lexicological aspects of stock-market participants' lexis system relations.