I can observe that package kde-l10n-es is not installed in my system, but Spanish is as an option in Systemsettings->Language & Region, and Spanish (Castilian) appears to be installed in qt-language-selector.
I can observe that package kde-l10n-es is not installed in my system, but Spanish is as an option in Systemsettings- >Language & Region, and Spanish (Castilian) appears to be installed in qt-language- selector.