• Serverless/Vercel: better error when public/locales/ is not available at runtime — the default filesystem backend now catches read failures and shows a clear error message explaining the serverless limitation with a resourceLoader code example #2337
• partialBundledLanguages + resources — when both resources and partialBundledLanguages: true are provided, the default backend is now correctly kept so it can load additional namespaces not included in the pre-loaded resources