Worked on the GregTech-Modern repository with a focus on localization quality, specifically addressing a critical formatting issue in the Japanese language files. Using JSON and leveraging skills in i18n and localization, corrected the display of usage counts and tooltips to ensure numerical values rendered accurately and without extraneous characters in the Japanese locale. This fix improved the reliability of the user interface for Japanese users and reduced localization-related inconsistencies across the application. The work involved integrating and validating the solution, which stabilized the JP localization and contributed to a smoother user experience while decreasing potential support requests related to localization errors.