Big claims and zero code examples? No I'm not going to go digging in a repo without so much as a top-level overview of the approach
The live sample of that is not very impressive. And even worse:
> These are the limitations you need to accept with this project structure:
> You have to be disciplined to only use dependencies that are published on jsdelivr (npm install programmers need to clean up their act)
That with a package.json which has dependencies @squaresapp/rawjs and rawter, both of which have no info on npmjs. Talk about "do as I say, not as I do". The idea that you might be able to handle things like i18n and a18y without dependencies screams "not invented here" syndrome.