I removed some unused language folders with localepurge from AUR(Link: AUR (en) - localepurge). But I cannot find my locale language (ko_KR). How can I restore language list? (KDE plasma on Arch Linux) I tried to reinstall locale related packages (glibc, glibc-locale, etc.) but nothing changed. 
I don’t tried, but if you install these? (if you don’t have)
~/Descargas zypper se -iv lang | grep plasma ✔ 15:56:24
i+ | kdeplasma6-addons-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: kdeplasma6-addons-lang
i+ | plasma-framework-lang | paquete | 5.116.0-1.4 | noarch | Repositorio principal (OSS)
name: plasma-framework-lang
i+ | plasma6-browser-integration-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: plasma6-browser-integration-lang
i+ | plasma6-desktop-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: plasma6-desktop-lang
i+ | plasma6-disks-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: plasma6-disks-lang
i+ | plasma6-integration-plugin-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: plasma6-integration-plugin-lang
i+ | plasma6-nm-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: plasma6-nm-lang
i+ | plasma6-pa-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: plasma6-pa-lang
i+ | plasma6-print-manager-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: plasma6-print-manager-lang
i+ | plasma6-systemmonitor-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: plasma6-systemmonitor-lang
i+ | plasma6-thunderbolt-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: plasma6-thunderbolt-lang
i+ | plasma6-workspace-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: plasma6-workspace-lang
And these:
~/Descargas zypper se -iv \*6-lang ✔ 16:15:26
Cargando datos del repositorio...
Leyendo los paquetes instalados...
S | Name | Type | Version | Arch | Repository
---+----------------------------------+---------+-------------+--------+----------------------------
i+ | bluedevil6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: bluedevil6-lang
i+ | discover6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: discover6-lang
i+ | flatpak-kcm6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: flatpak-kcm6-lang
i+ | kactivitymanagerd6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: kactivitymanagerd6-lang
i+ | kde-cli-tools6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: kde-cli-tools6-lang
i+ | kgamma6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: kgamma6-lang
i+ | kinfocenter6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: kinfocenter6-lang
i+ | kirigami-addons6-lang | paquete | 1.10.0-1.3 | noarch | Repositorio principal (OSS)
name: kirigami-addons6-lang
i+ | kmenuedit6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: kmenuedit6-lang
i+ | kscreen6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: kscreen6-lang
i+ | kscreenlocker6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: kscreenlocker6-lang
i+ | ksshaskpass6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: ksshaskpass6-lang
i+ | ksystemstats6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: ksystemstats6-lang
i+ | kwalletd6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: kwalletd6-lang
i+ | kwin6-lang | paquete | 6.5.4-2.1 | noarch | Repositorio principal (OSS)
name: kwin6-lang
i+ | libgphoto2-6-lang | paquete | 2.5.33-1.1 | noarch | Repositorio principal (OSS)
name: libgphoto2-6-lang
i+ | libKF6Archive6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6Archive6-lang
i+ | libKF6Baloo6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6Baloo6-lang
i+ | libKF6Bookmarks6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6Bookmarks6-lang
i+ | libKF6CalendarEvents6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6CalendarEvents6-lang
i+ | libKF6Codecs6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6Codecs6-lang
i+ | libKF6ColorScheme6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6ColorScheme6-lang
i+ | libKF6Completion6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6Completion6-lang
i+ | libKF6ConfigCore6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6ConfigCore6-lang
i+ | libKF6ConfigWidgets6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6ConfigWidgets6-lang
i+ | libKF6Contacts6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6Contacts6-lang
i+ | libKF6DAV6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6DAV6-lang
i+ | libKF6DBusAddons6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6DBusAddons6-lang
i+ | libKF6DNSSD6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6DNSSD6-lang
i+ | libKF6GlobalAccel6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6GlobalAccel6-lang
i+ | libKF6Holidays6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6Holidays6-lang
i+ | libKF6I18n6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6I18n6-lang
i+ | libKF6IconThemes6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6IconThemes6-lang
i+ | libKF6ItemViews6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6ItemViews6-lang
i+ | libKF6JobWidgets6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6JobWidgets6-lang
i+ | libKF6KCMUtils6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6KCMUtils6-lang
i+ | libKF6NewStuffCore6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6NewStuffCore6-lang
i+ | libKF6Notifications6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6Notifications6-lang
i+ | libKF6NotifyConfig6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6NotifyConfig6-lang
i+ | libKF6Parts6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6Parts6-lang
i+ | libKF6Pty6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6Pty6-lang
i+ | libKF6Solid6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6Solid6-lang
i+ | libKF6SonnetCore6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6SonnetCore6-lang
i+ | libKF6StatusNotifierItem6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6StatusNotifierItem6-lang
i+ | libKF6Su6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6Su6-lang
i+ | libKF6SyntaxHighlighting6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6SyntaxHighlighting6-lang
i+ | libKF6TextWidgets6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6TextWidgets6-lang
i+ | libKF6UnitConversion6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6UnitConversion6-lang
i+ | libKF6WidgetsAddons6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6WidgetsAddons6-lang
i+ | libKF6WindowSystem6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6WindowSystem6-lang
i+ | libKF6XmlGui6-lang | paquete | 6.21.0-1.1 | noarch | Repositorio principal (OSS)
name: libKF6XmlGui6-lang
i+ | libkgapi6-lang | paquete | 25.12.0-1.1 | noarch | Repositorio principal (OSS)
name: libkgapi6-lang
i+ | libKPim6AkonadiCalendar6-lang | paquete | 25.12.0-1.1 | noarch | Repositorio principal (OSS)
name: libKPim6AkonadiCalendar6-lang
i+ | libKPim6AkonadiMime6-lang | paquete | 25.12.0-1.1 | noarch | Repositorio principal (OSS)
name: libKPim6AkonadiMime6-lang
i+ | libKPim6CalendarSupport6-lang | paquete | 25.12.0-1.1 | noarch | Repositorio principal (OSS)
name: libKPim6CalendarSupport6-lang
i+ | libKPim6EventViews6-lang | paquete | 25.12.0-1.1 | noarch | Repositorio principal (OSS)
name: libKPim6EventViews6-lang
i+ | libKPim6Gravatar6-lang | paquete | 25.12.0-1.1 | noarch | Repositorio principal (OSS)
name: libKPim6Gravatar6-lang
i+ | libKPim6IMAP6-lang | paquete | 25.12.0-1.1 | noarch | Repositorio principal (OSS)
name: libKPim6IMAP6-lang
i+ | libKPim6IncidenceEditor6-lang | paquete | 25.12.0-1.1 | noarch | Repositorio principal (OSS)
name: libKPim6IncidenceEditor6-lang
i+ | libKPim6Itinerary6-lang | paquete | 25.12.0-1.2 | noarch | Repositorio principal (OSS)
name: libKPim6Itinerary6-lang
i+ | libKPim6KontactInterface6-lang | paquete | 25.12.0-1.1 | noarch | Repositorio principal (OSS)
name: libKPim6KontactInterface6-lang
i+ | libKPim6Mime6-lang | paquete | 25.12.0-1.1 | noarch | Repositorio principal (OSS)
name: libKPim6Mime6-lang
i+ | libKPim6MimeTreeParserCore6-lang | paquete | 25.12.0-1.1 | noarch | Repositorio principal (OSS)
name: libKPim6MimeTreeParserCore6-lang
i+ | libKPim6SMTP6-lang | paquete | 25.12.0-1.1 | noarch | Repositorio principal (OSS)
name: libKPim6SMTP6-lang
i+ | libKPim6TextEdit6-lang | paquete | 25.12.0-1.1 | noarch | Repositorio principal (OSS)
name: libKPim6TextEdit6-lang
i+ | libKPim6Tnef6-lang | paquete | 25.12.0-1.1 | noarch | Repositorio principal (OSS)
name: libKPim6Tnef6-lang
i+ | libKPipeWire6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: libKPipeWire6-lang
i+ | libksysguard6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: libksysguard6-lang
i+ | libPlasma5Support6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: libPlasma5Support6-lang
i+ | libPlasma6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: libPlasma6-lang
i+ | milou6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: milou6-lang
i+ | polkit-kde-agent-6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: polkit-kde-agent-6-lang
i+ | powerdevil6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: powerdevil6-lang
i+ | qtkeychain-qt6-lang | paquete | 0.15.0-1.1 | noarch | Repositorio principal (OSS)
name: qtkeychain-qt6-lang
i+ | sddm-kcm6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: sddm-kcm6-lang
i+ | systemsettings6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: systemsettings6-lang
i+ | wacomtablet-kcm6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: wacomtablet-kcm6-lang
i+ | xdg-desktop-portal-kde6-lang | paquete | 6.5.4-1.1 | noarch | Repositorio principal (OSS)
name: xdg-desktop-portal-kde6-lang
Regards
Thank you for reply! I had no idea what to do, so I just re-installed all plasma & plasma-workspace package by command below.
sudo pacman -S plasma plasma-workspace --overwrite ‘*’
Then, everything goes fine now.