I'm having a problem installing a locale, it appears to work downloading but when the install box closes there is a message that says error encountered.
maybe you're hitting this bug
CSCsi57553 - "Localization install does not mention CuCsMgr/CuMixer should be stopped"
You need to stop the Connection Mixer (CuMixer) and the Connection
Conversation Manager (CuCsMgr) and then complete the locale install.
Utils service list
Utils service stop/start