Chaib ,Kawther AmiraBoukada, HiziaBelouadi ,Fatima Zohra2026-07-152026-07-152026https://dspace.univ-temouchent.edu.dz/handle/123456789/7380This dissertation falls within the field of French as a Foreign Language (FFL) didactics and examines the impact of dictionary use on the lexical quality of learners’ written productions. Through the analysis of texts written without a dictionary, with a bilingual dictionary, and with a monolingual dictionary, this study highlights the effects of these tools on lexical richness, diversity, and appropriateness. The findings show that the monolingual dictionary contributes more effectively to vocabulary enrichment and the improvement of written expression. This research therefore emphasizes the importance of dictionaries as pedagogical tools in learning French as a foreign language.otherFFL didacticswritten productionlexical richnessbilingual dictionarymonolingual dictionarylexical competenceThesis