Please check if I have created the language subpackages correctly. Especially the qt-lang subpackage.

%find_lang %{name} %{name}-qt.lang --with-qt --without-mo --all-name

Without --all-name, it does not find localization files, no matter which first parameter I specify for the find_lang macro. With --all-name, it always finds localization files, no matter what the first parameter I specify for the find_lang macro. I'm not sure if it's okay. This should work without --all-name.

Also, the qt-lang subpackage is not automatically loaded when installing qt.