Worked on enhancing the robustness and internationalization of the Qt HighGUI component in the opencv/opencv repository, focusing on reliable handling of window titles across different languages. Addressed a critical bug by ensuring UTF-8 encoding was preserved for window titles, which prevented issues with non-ASCII characters and improved window lookup reliability in multilingual environments. The solution involved explicitly converting C-string entry points to UTF-8 in fallback paths, thereby avoiding lossy Latin-1 conversions and reducing the risk of silent display failures. Utilized C++ and the Qt framework to deliver more consistent cross-platform GUI behavior and improved support for non-English locales.