There are multiple screenreaders but their voices simply suck. KDEs espeak has way worse voices than Android eSpeak for some reason.
There is Thorsten Voice, a grest project that sounds really nice.
Not sure if he has a espeak dataset too.
Do you know any others?
Its essential for blind people, I dont think any blind person uses Linux if they have to hear these robot voices every day.
So it is, that's why some languages don't have good support yet - not enough recordings
Also the last release is very old. Mozilla is weird, their pinned projects are often dead or outdated…