[Feature Request] Switch language automatically

It would be better if it automatically redirect to translated pages based on user's browser language.
On mobile, language switch button is located at the very bottom of the hamburger menu that difficult to find, so this will be especially helpful !

No files or tests are identified in the issue. Start by locating the wiki's language-switching control and page-routing entry points, then check how translated pages are organized and how browser language preferences could be handled. Done means supported browser languages redirect to the matching translated page, with a sensible fallback and a discoverable mobile switcher.

Written by the indexing model from the issue text.