During July 2025, Matheus Gurgel expanded localization coverage for AI features in the duckduckgo/duckduckgo-locales repository by introducing new AI-related tokens and updating UI strings across multiple languages using PO files. He enhanced the localization pipeline to automate the generation of localized strings for AI chat interactions, error messages, and settings, addressing gaps in internationalization and localization. Collaborating with product and i18n teams, Matheus standardized AI terminology to ensure consistency across locales. His work focused on enabling a more cohesive global user experience for new AI features, demonstrating depth in internationalization and localization engineering within a short project period.