It's a weird story. I used to have huge difficulty in talking even to family and the therapist. I would smile too much, just walking down the street. It used to be like that for some years, maybe 3, after being diagnosed. Then about 3 years ago within like 3 weeks it changed, I don't smile anymore for no reason and after that talk to myself, no idea why it happened. I'd go back to the alogia any day, this talking to myself problem is embarrassing and has caused lots of problems.
I think just practicing conversations with somebody or in your head might help alogia.