During March 2025, Anran developed UI Translation Compliance Tooling for the formatjs/formatjs repository by implementing a custom ESLint rule that detects literal strings in object properties such as 'label'. This rule enforces translation discipline in JavaScript and TypeScript codebases, helping teams identify and address untranslated UI text early in the development process. Anran’s approach included writing automated tests to ensure rule reliability and providing comprehensive documentation to support adoption. By leveraging ESLint, TypeScript, and testing best practices, Anran delivered a focused feature that integrates seamlessly into existing workflows, addressing localization gaps and improving the overall quality of UI translations.