Yes, it is absolutely true that Wagner Moura learned Spanish for his role in Narcos. Moura, who is a Brazilian native, primarily spoke Portuguese before taking on the role in the series. In order to portray Colombian drug lord Pablo Escobar more authentically, he decided to learn Spanish from scratch. He moved to Medellín, Colombia six months prior to the start of filming to help immerse himself in the local culture and language. He participated in an intensive Spanish course and practice on location with his local Colombian peers. He admitted in multiple interviews that the language challenge was tough, but he also expressed how rewarding the learning process was, thus enabling him to do justice to the character. The effort Moura put into understanding the language and culture of the character he was impersonating greatly added to the complexity of his performance and gave him a closer understanding of the cultural context in which Escobar's actions took place. The authenticity he brought to the table certainly had a significant impact on the success of the show. So if you're watching Narcos and are amazed by Wagner Moura's performance, remember that it's not just his acting skills - it's also a testament to his dedication and willingness to go the extra mile for his craft.