This was also the nature of my intended comment.
There have been a number of studies that specifically linked advanced "artistic" personalities with increased risk of psychosis and other breaks from reality.
One citation:
https://www.cambridge.org/core/journals/the-british-journal-...
I had never heard of Toki Pona, and I find the project amazing!
The only other invented language I have heard of is esperanto. Which I have always been interested in, but never studied.
My heart goes out to the author of this language, I hope they are able to find their way back. There is certainly a community that hopes to help and support them.
This is much more than many distressed people have to hope for, and I hope they are able to find solace in that support.