Enhancing Large Language Models for Underrepresented Varieties: Pretraining Strategies in the Galician-Portuguese Diasystem - Rodríguez, Pablo; Gamallo, Pablo; Santos, Daniel; Sotelo, Susana; Paniagua, Silvia; Pichel, José; Salgueiro, Pedro; Nogueira, Vítor; Quaresma, Paulo; Garcia, Marcos; Barro, Senén (2025)