/usr/lib/x86_64-linux-gnu/ is in libkf5i18n-dev 5.18.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/qt5/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/qt_KI18n.pri
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/KF5I18n/
/usr/lib/x86_64-linux-gnu/cmake/KF5I18n/KF5I18nConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5I18n/KF5I18nTargets.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5I18n/KF5I18nTargets-debian.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5I18n/kf5i18nuic.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5I18n/ts-pmap-compile.py
/usr/lib/x86_64-linux-gnu/cmake/KF5I18n/KF5I18NMacros.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5I18n/KF5I18nConfig.cmake
/usr/lib/x86_64-linux-gnu/libKF5I18n.so