Locale folders
Keep each document concept in one folder and place translated MDX files inside it.
Instead of naming files by locale in the slug itself, EmcyDocs treats a folder as the document identity and language files inside that folder as localized variants.
The default locale can stay clean at /docs/... while non-default locales can live at /es/docs/....
If a translated file is missing, EmcyDocs can fall back to the default language without changing the route structure.