Auto detection language support

We are currently implementing LiveAvatar via API call and require the avatar to automatically detect and respond in the user's spoken language (English or Hindi) without manual selection, mirroring the functionality of the live UI version.

Currently, this auto-detection is not working as expected. Could this be because we are using Sandbox mode? Will the API support automatic language detection once we move out of Sandbox mode, similar to the live version?

Please let us know how we can resolve this.