I got prosthetic teeth for the lower left after my mandiblectomy. I did not have tongue involvement like she did as mine was in the tonsil and lower sinus as well as beneath the tongue. Years to a new normal followed by the mandible surgery about 19 years later. Still enjoying life however. Something like this happens and it really gives life a new focus. I wish you both well. As my wife who has MS in addition to dealing with my bag of hammers says, "Life is what happens when you are making other plans."
Keep me posted as to her recovery and if you have questions, I or someone is usually reading these feeds.