Worked on the neos/flow-development-collection repository to enhance localization by delivering complete Portuguese translations for validation error messages related to disallowed file extensions. Focused on internationalization and localization, the work ensured that Portuguese-speaking users receive consistent and fully localized validation feedback throughout the framework. The implementation was carried out using XML for translation files and managed through the Weblate platform, following the established translation workflow. By achieving 100% translation coverage, the update aligned validation user experience with the broader localization strategy, improving accessibility and usability for a wider audience without introducing new bugs or altering existing application logic.