eslint-plugin-format-message

ESLint plugin providing i18n-specific lint rules for format-message, an ICU Message Format internationalization library. Version 6.2.4 is the current stable release (last updated 2020). It includes 8 rules: literal-pattern, literal-locale, no-identical-translation, no-invalid-pattern, no-invalid-translation, no-missing-params, no-missing-translation, and translation-match-params. Requires eslint >=2.0.0. Key differentiator: integrates compile-time checks for format-message patterns, translations, and parameter usage, preventing runtime errors in i18n workflows.