The present book is a selection of papers from the 14th International Conference on the History of the Language Sciences (Paris 2017). The volume is divided thematically into three parts: I. Notions and categories, II. Representations and receptions, III. Learning, codification and the linguistic practices of social actors. The first part is especially concerned with data not easily handled by extant traditions of linguistic analysis, and with constructs and perspectives which proved difficult to establish in the linguist's descriptive apparatus. Part II groups six studies dealing with alternative representations of linguistic data, and matters of interpretation and reception regarding the work of three important linguists (Saussure, Jespersen, Chomsky). The scope of part III embraces social and pedagogical practices as well as the involvement of linguists in questions of national identity.