Marielle Muschko worked on improving localization accuracy in the Wandelbots JS React Components repository, focusing on the JoggingStore UI. She addressed a translation issue by updating the German localization, ensuring the correct pluralization of 'joint' to 'joints' for German-speaking users. Using TypeScript and applying internationalization best practices, Marielle validated the translation fix and contributed to the overall quality assurance process for language support. Her work included updating documentation to clarify translation procedures, which helped close a specific translation gap. While the scope was limited to a single bug fix, the solution demonstrated careful attention to linguistic and user experience details.