Worked on refining Polish localization within the laurent22/joplin repository, focusing on improving the accuracy and naturalness of Polish translations across the user interface and system messages. Applied internationalization and translation quality assurance skills to review and update UI strings, ensuring consistency and clarity for Polish-speaking users. Utilized JavaScript, TypeScript, and PO files to implement these changes, with careful commit traceability to document updates. The work addressed translation gaps and enhanced the overall user experience, laying a foundation for future localization efforts. No major bugs were fixed during this period, with efforts concentrated on feature-level improvements in language support.