Complex sentence: Dremora have appeared in at least four Elder Scrolls games, Daggerfall, Battlespire, Morrowind and Oblivion, where in the last three of these games the player is able to speak with certain Dremora, implying that these Daedra communicate linguistically.
Split into simpler sentences: Dremora have appeared in at least four Elder Scrolls games, Daggerfall, Battlespire, Morrowind and Oblivion. In at least three of these games (Battlespire, Morrowind, and Oblivion), the player is able to speak with certain Dremora, implying that these Daedra communicate linguistically.