Since there is often no dedicated in-game menu for language, the game typically defaults to your system's language.
Si estás buscando el juego, la forma segura y legal de jugarlo en español (con textos y doblaje completos) es a través de plataformas oficiales. El "Mega" que mencionas suele referirse a sitios de descarga no oficiales que pueden conllevar riesgos de seguridad.
Versions often hosted on MEGA, such as those from DODI Repacks or FitGirl, usually include "MULTi13" support, which covers both Spanish (Spain) and Spanish (Latin America). How to Change Language to Spanish