This is a trivial problem to solve on a physical interface. One solution could be what is commonly used on hardware synthesizers. A shift button or switch. You engage it and all controls begin to perform their secondary functions. You get redundancy for the price of one extra control and a secondary set of labels in a different color.

Also, use of displays to virtually label buttonss is common. In such case you can reassign a control if one fails.

In any case Dragon capsule had physical buttons for important functions as a backup.