Within Age of Empires III: Definitive Edition are a set of Accessibility options that determine what aspects of the game are narrated. This is easy to adjust:
- Launch Age of Empires III: Definitive Edition.
- Select Options and then Accessibility.
- Scroll down to the Narrator section and there will be multiple options to turn narration on or off in various parts of the game.
- Click Apply to save your settings.