https://mcturra2000.wordpress.com/2020/01/19/a-recursive-descent-parser-in-forthlang-and-a-nod-to-rakulang/ muses about finding a marriage of META II and Forth. I've done a couple things in that direction: https://github.com/darius/sketchbook/tree/master/metatoo/metametoo modified META II to work with a local stack instead of a register, and you could take it further towards Forth. (Only worth reading for other people exploring out from META II.)
https://github.com/darius/parson/blob/master/eg_basic.py is maybe more interesting: a BASIC expressed as a PEG grammar with interleaved actions in a vaguely Forthy style.
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!