There is a difference between wanting speaker 'on' and having listening exercises 'on'
It would be wonderful if that distinction could be made in the options!
How are you wanting it to behave? As well as Speaker on/off you can turn on Voice autoplay and turn on/off Sound effects. What else would you want?
Hmm you're right. How strange - my autoplay is set to 'on', but it doesn't play...