DJEDIAI Abdelmalek is a doctor in Language Sciences and Lecturer (A), at the University of El-Oued (Algeria) where he teaches and directs work in linguistics and applied linguistics as fields of concern to which the author has devoted efforts, including a master’s thesis on collocations in legal discourse, a doctoral thesis on linguistic fixedness, a book on fixedness published by E.U.E, some published articles and communications on the idiomaticity, on translation and specialized languages. He also directs a few scientific journals as associate editor or member of the reading committee.