Another way to switch languages on the fly is to use the vo command arrows. If
you have both an English and the Spanish voice installed, hold down control
option command, and use the left and right arrows to choose an aspect of the
voice you want to change. One of them, among pitch etc, is the v
I don't know if you can get it to switch languages on the fly, but you could at
least create an appropriate activity.
1. Go into VoiceOver utility with Vo-f8.
2. Go down to activities, then go over to the add button and hit it. Type in a
name, Spanish for example.
3. Now you'll see your new acti