i18n-unused

• A static analysis tool for identifying, marking, and removing unused/missing i18n translations in JavaScript projects
• Works with various i18n libraries by detecting translation keys in source code
• Supports JSON locale files by default (configurable for other formats)
• Key features:
  • Display unused/missing translations
  • Mark unused translations with customizable markers
  • Remove unused translations automatically
  • Sync translations between locale files
• Provides programmatic API through functions like collectUnusedTranslations() and collectMissedTranslations()
• Highly configurable with options for:
  • File paths/extensions
  • Key matching patterns
  • Context handling (plurals, gender, etc.)
  • Custom parsers/loaders
  • Exclusion patterns
• Target audience: Developers working with internationalized JavaScript applications who want to maintain clean translation files
• License: MIT