Oosydev contributed to the mdn/translated-content repository by enhancing the accuracy of JavaScript documentation, specifically focusing on the terminology used for WeakMap and WeakSet. Through careful technical writing and documentation skills, Oosydev corrected a persistent typo, changing “weekly held” to the accurate “weakly held,” thereby clarifying the concept of weak references for developers. The work emphasized maintaining translation quality, particularly for the [ko] locale, ensuring that localized content remained precise and reliable. Using Markdown as the primary language, Oosydev’s efforts improved documentation clarity without introducing regressions, reflecting a thoughtful approach to non-regression documentation cleanup and localization consistency.