Zakaria RAZZA, Khalid SOUSSI et Sara MOUJTAHID 2026. Prepositional Errors in English as a Foreign Language: L1 Interference, Trilingual Transfer, and Task-Format Effects Among Moroccan Arabic Undergraduates. African Scientific Journal. 3, 38 (sept. 2026). DOI:https://doi.org/10.5281/zenodo.23056706.