With Personal Voice, you can create a synthesized voice that sounds like your own to communicate with family and friends. Use your Personal Voice to type to speak in FaceTime and phone calls, assistive communication apps, and in-person conversations. After setting up Personal Voice on an iPhone, iPad, or Mac, you can choose to use that voice with Live Speech on your AppleWatchUltra. (Available in select languages.)
To use your Personal Voice on AppleWatchUltra:
Open the Settings app on your AppleWatchUltra.
Go to Accessibility> Live Speech.
Tap English (US), then choose your Personal Voice.
Important: You may only use Personal Voice to create a voice on your iPhone, iPad, or Mac that sounds like you using your own personal voice for your personal, noncommercial use.