The only difference I notice between this and Wikipedia is that I can't hover over a link and get a pop-up description of the page. Is that all or is there more to it?
> https://wikiless.org - a free open source alternative Wikipedia front-end focused on privacy. No JavaScript or ads. All requests go through the backend, client never talks to Wikipedia. Prevents Wikipedia getting your IP address. Self-hostable. Anyone can setup a private or public instance.
From the README [0] and code, I'd wager that the only thing happening is that JS has been filtered out, that the CSP rules are significantly stricter and that a dark mode has been added.
From: https://codeberg.org/orenom/Wikiless