Well the best you can do is try to learn, or if she can read lips, then try to talk slow or make sure she's watching.
In terms of making her more comfortable, just repeat what you always do. if there's something she enjoys like certain activities, then recreate them each day.
I don't mean to sound condescending, but learning sign language isn't that hard, there are a lot of tutorials out there, and although they're just the basics, I'm sure she'd be happy that you're giving the attempt to communicate.
If you do try, remember that it takes time to get the hang of it, So don't stress or give up.
This would be known as a communication skill, communication is also a really important must to health. Being able to communicate about your feelings, pain, symptoms, and so on lets others know ways to help you and get an idea of what may be going on
It attacks the white blood cells, disabling them and making them unable to fight off diseases. People with HIV often die from small diseases such as the common cold because all of their white blood cells have been disabled and are unable to protect them.
