La systémique diachronique et comparée des langues romanes

he aim of this article is to renew the comparative approach to neighbouring languages, in particular Romance languages. Without denying the achievements of comparative grammar of languages and the scientific advances of research in language typology, it aims to establish new linguistic principles which place diachrony and synchrony on the same level within the framework of a linguistic systemics largely inspired by Gustave Guillaume's psychomechanics of language, especially for the notions of system and deflexivity. This approach also makes it possible to integrate sociolinguistic approaches with the concept of "micro-diachrony" which makes it possible to describe a linguistic system as a system in perpetual unstable balance.