After almost 2 days I found the answer in the manual on page 46. Here it is if anyone else wants to know:
2.9 Menu Readout Allows the phone to read menus out loud.
1. Swipe your finger across the screen in any direction to unlock and touch the Menu Key .
2. Touch Settings .
3. Touch Sounds Settings.
4. Touch Menu Readout to toggle the setting between ON and OFF
She is now quite.