ajv-i18n provides localization (i18n) support for the Ajv JSON schema validator. It offers error message translations for various languages, making it easier to display user-friendly validation errors in your application. By integrating ajv-i18n, developers can ensure that error messages are presented in the user's preferred language, significantly improving the user experience and accessibility of data validation processes. The package supports multiple locales and is easily integrated with Ajv.