In January 2026, Warukeichi enhanced the InvokeAI repository by implementing localized error messages for masked area extraction within the application. Using React and JavaScript, Warukeichi centralized translation strings into a dedicated file, refactoring error handling to surface user-facing messages based on locale. This approach improved both the clarity and consistency of error notifications, particularly for international users, and streamlined future maintenance of localization features. Additionally, popup error notifications were redirected to leverage the new translation system, ensuring a uniform user experience across different languages. The work demonstrated disciplined change management with clear commit traceability and focused on front end development.