Interesting article! Thanks for sharing, I will definitely look into Astro UI, this sounds awesome.
I'm working for a company called inlang and we're building an ecosystem for globalization. Nano Stores i18n seems like a suitable project, but in case you want to try out something new with peak performance + features like tree shaking, feel free to check out Paraglide JS (our own i18n lib) which works with all common frameworks: https://inlang.com/m/gerre34r/library-inlang-paraglideJs