I'm all for a hobby projects, this looks good. No disparagement on the effort.
But I think the community would be better served if all this brain power could get behind a smaller set of languages. We have hundreds of languages now, none of them are going to get enough market share to ever be adopted.
on the second point yes, one the one hand too many languages and too few will see large adoption
one the other hand, competition and activity will drive the popular language to continue innovation and not stagnate, look at C# continuously adding functional features, java also to a lower degree
while many of those new small languages will never see wide use, their existing is pushing the tides