I think what is need, is Voice interface, that lets you your speak into your radio ,TX it as code and RX speech.
Thinking outside the box is good, but sometimes produces solutions in search of a problem. Speech to digital to speech already exists (on the ham bands and on your cell phone) and accomplishes the task more efficiently than if encoded as morse.
Morse to speech, however, could be of value to no-code caretakers for a mute ham, but only if the ham could form characters well enough for machine decoding. (Tongue in cheek, too many hams can't do that even without a disability.