I’m sorry, I’m not often someone to whine about Firefox UI. Usually their changes have been for good actually. BUT! But but but. Proper UI design would require AI features to be disabled if the toggle is disabled. This is both highly silly and very confusing.
I don’t recommend disabling the on-device translations and speech to text feature. Yes, they are “AI” but they are the good on-device offline AI services that are actually useful. Without the on-device translation feature, you’ll have to rely on web based Google Translate. Same with the speech to text feature.