My 98 year old mom has late stage dementia. For months, if she’s been taking at all, it’s been in Polish..her first language. She was sleeping a lot and basically was just existing. For the few weeks, she is speaking English, talks almost constantly to whoever is there to listen, feeds herself (doesn’t want help), and thinks she can stand up and walk (she’s been in a wheelchair after a couple of bad falls). What is going on?