Currently, the first language you set up in Localization becomes the permanent primary locale and there's no way to promote a secondary locale to replace it. If you later decide a different language should be the primary one, the only option is to manually rebuild the site from scratch, which is a significant amount of work.

It would be great if Framer allowed users to swap or reassign which locale is the primary one, so existing translations and content are preserved without needing to start over.