Current designs for ToggleSwitch include a label on the "off" side of the switch.

However, sometimes it would be helpful to have separate labels for the "off" side and the "on" side, plus a label for the switch itself. Consider the controls for configurable demos on the Codex docs site:

Button demo, with disabled prop turned off

Button demo, with disabled prop turned on

We should consider how we might add on/off labels to this use case in a way that is semantic and accessible, and how we might enable this within the ToggleSwitch component itself for other use cases.