Alan Null contributed to the laurent22/joplin repository by refining Polish localization across the application's user interface and messages. Focusing on internationalization and translation quality assurance, Alan systematically reviewed and updated Polish language strings to ensure accuracy and natural phrasing for end users. Using JavaScript, TypeScript, and PO files, he addressed translation gaps and improved consistency throughout dialogs, menus, and notifications. The work established a clear baseline for future localization updates, including documentation and traceability of changes. While the contribution was limited to one feature over a month, it enhanced the experience for Polish-speaking users and supported broader localization efforts.