Worked on expanding the user interface for MONETA-SmartBanka/localization-json by implementing new localization keys for the Smart Services and Sales menu entries. Focused on internationalization, the approach involved updating JSON files to introduce readiness for future translations and UI expansion, aligning with the product roadmap. All changes were tracked through a dedicated commit to ensure traceability and maintainability. The work centered on enabling broader language support and facilitating easier adaptation of the application for diverse user bases. Utilized skills in internationalization and JSON, with an emphasis on structured data management to support scalable and flexible UI localization for ongoing development needs.