What is i18n-audit?
i18n key consistency check. Detects key differences between messages/ja.json and messages/en.json, reporting missing translations or unnecessary keys. Always use this after adding, deleting, or modifying translation keys, or whenever you are concerned about the synchronization between ja/en or want to check for i18n key mismatches. When working on translation files, consider using this skill even if not explicitly requested. Source: yusuketsunoda/ppt-trans.