The language code with hyphens can't generate the collection correctly #1233
Description
Hey, I noticed pt-BR was added recently, but I'm running into some trouble when using it with the i18n template (npx create-docus my-docs -t i18n).
It looks like this might affect anyone using languages supported by nuxt-ui that have hyphens in the language code(eg. zh-CN,en-GB), even if Docus doesn't fully support them yet.
Reproduction:
I put together a minimal reproduction here:
https://github.com/enpitsuLin/docus-i18n-code
Screenshot:
