There is enough projects to create a list of hello world programs, not sure yet another one is meaningful. And the languages are so old in my brain I would not be able to make them any more :-)
RPG III?, STOS, GL Basic, Assembler for Atari ST, seems to have forgotten the fifth again...
There are a few similar projects like GL Basic [0] that works on windows and Linux. Also some "fantasy computers" that has imagined limits that you are forced to stay inside, bringing out your creative side :-) Try TIC-80 [1] for example.
Maybe you could create a PR for them?