Документация написана на английском.
The user's guide, as a web page
index.html is the guide for someone installing HakiOS beside Android on the POCO X5 Pro: what it is, the five steps
of the installation, the menu at every start, the data volume, what works, and what to do when it goes wrong. One
file, nothing to build: GitHub Pages serves it from this directory (Settings -> Pages -> branch, folder /docs/site),
or open it in a browser. The developer's documentation is docs/u-boot.md and docs/boot-args.md.