Standard button text(Yes, No) not been translated

I used qt installer framework 4.1( from qt 5.15.2) to build a installer with locale set to zh_CN. Every thing works like a charm except when i try to cancel the installation, the pop up messagebox show the "Yes" and "No" button text without untranslated(See the attached screenshot), and other text from installer-framework got translated.

I test it both on macOS 11.5 and Windows 10, the standard button text all failed to be translated.

And i made some debugging to the installer-framework, it show that qt_zh_CN.qm are rightly compiled to the binary, and it been succeefully loaded by QCoreApplication::instance()->installTranslator in installerbase.cpp.