I don't see any change between SLE-15-SP5 and master in yast-country/language.
> src/yast/yast-country/language % git diff upstream/SLE-15-SP5..master .
> src/yast/yast-country/language %
Similarly, I don't see any change that might be even remotely relevant between
SLE-15-SP5 and master in yast-ruby-bindings.
The YaST Ruby part uses the 'Fastgettext' Ruby GEM. Does that do any C calls to
any locale-related function? I don't know.