Before anyone gets too worried, the Anglish community in my (limited) experience has been incredibly anti-racism/Nazi/etc.
They are just a bunch of linguistics nerds who are having fun imagining what English would have been without a Norman invasion.
In the same spirit, I'd recommend checking out the Uncleftish Beholding. Although I think it predates the modern Anglish community, it's an attempt to describe Quantum Mechanics with Latin/French derived words.
https://www.ling.upenn.edu/~beatrice/110/docs/uncleftish_beh...