Jonas Pfeiffer-Wagner focused on enhancing localization for the pretix/pretix repository by delivering a comprehensive German language update across the user interface. Using Python and translation management tools, Jonas achieved full translation coverage for over 6,200 UI strings, ensuring accuracy and consistency throughout the application. The work included refining existing translations and integrating Weblate with centralized translation references to streamline ongoing internationalization efforts. By establishing a more robust translation workflow, Jonas addressed the needs of German-speaking users and laid the groundwork for sustainable localization maintenance. The depth of the update reflects careful attention to both linguistic detail and technical process improvement.