Here are some possibilities:
* In video games: Avatars often don't speak, or their language is specific to the game's world and not translatable to real-world languages.
* In virtual reality: Avatars are representations of users, so they speak whatever language the user speaks.
* In the movie "Avatar": The Na'vi, the blue-skinned humanoid species, speak Na'vi, a fictional language created for the film.
* In general: Avatars are often representations of people in different contexts. They might speak any language the person they represent speaks.
To give you a more specific answer, I need more information! Can you tell me:
* What kind of avatar are you talking about? (Video game, virtual reality, movie, etc.)
* What is the context? (What is the avatar doing or where is it located?)
Once you provide me with more details, I can give you a more accurate answer.