Ugh.

The name jai is very taken[1]... names matter.

[1]: https://en.wikipedia.org/wiki/Jai_(programming_language)

a closed beta of an obscure programming language where the wikipedia page is nominated for deletion because it is a "Non-notable programming language that is not publicly available." is considered "very taken"?

That's an unreleased product in closed beta. Might not any name conflict with some unreleased product in closed beta?

Slightly taken, at best.

Jonathan Blow has said that "Jai" is just a placeholder name or something.

I hadn’t heard that. Thanks