Hi all!

I was looking for a way to automatically redirect users to the documentation in their language, based on their locale. The docs suggest to use a server-side redirect for that, so I came up with a Cloudflare Workers script that does the trick for me.

Right now, I only have one additional language (Brazilian Portuguese), so the script isn't super generic, but it should be a good starting point for other Docusaurus users who can adapt it to their needs.

↣ auto-locale CloudFlare Workers script

The script checks the "Accept-Language" header, and if Portuguese has a higher priority than English, it'd prepend /pt-BR to the request path. It also tries to avoid overriding user-chosen language by looking at the Sec-Fetch-Site and Referer headers. So if the user explicitly choses a different language (e.g. English), it will skip the redirect.

Ideally, I'd love if Docusaurus stored the user chosen language in a cookie (or at least, would append some query string to the URL so that the script could detect it and set such cookie). This would allow user choice to persist, so the user won't have to set the language every time when visiting the documentation.