The Localization package extends Unity’s built-in localization and remains a complete localization system for projects that have not moved to it.
Unity itself provides string and asset tables, Smart Strings, locale management, and CSV and XLIFF import and export. This package adds:
• An upgrade wizard that converts your table collections and components to the built-in system, with a redirect layer that keeps existing scripts working.
• Addressables support, so localized content loads on demand and can ship separately, for example as language packs.
• Google Sheets synchronization for working with translators.
• Property variants, to edit component properties per locale in the Inspector.
• Pseudo-localization, to test layout before translations arrive.
Projects that have not upgraded keep the package’s full workflow: string localization with Smart Strings, asset localization, and import and export of localization data.
Core packages are fixed to a single version matching the Editor version.