Deobfuscating Leetspeak With Deep Learning to Improve Spam Filtering. - Iñaki Vélez de Mendizabal; Xabier Vidriales; Vitor Basto-Fernandes; Enaitz Ezpeleta; José Ramón Méndez 001; Urko Zurutuza (Int. J. Interact. Multim. Artif. Intell., 2023)