HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Control Panel\International

Restrict Language Pack and Language Feature Installation
- HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Control Panel\International\RestrictLanguagePacksAndFeaturesInstall
Block clean-up of unused language packs
- HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Control Panel\International\BlockCleanupOfUnusedPreinstalledLangPacks
Disallow user override of locale settings
- HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Control Panel\International\PreventUserOverrides
Disallow changing of geographic location
- HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Control Panel\International\PreventGeoIdChange
Restrict user locales
- HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Control Panel\International\RestrictUserLocales
- HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Control Panel\International\AllowableUserLocaleTagList
Disallow copying of user input methods to the system account for sign-in
- HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Control Panel\International\BlockUserInputMethodsForSignIn
Restrict system locales
- HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Control Panel\International\RestrictSystemLocales
- HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Control Panel\International\AllowableSystemLocaleTagList
Disallow selection of Custom Locales
- HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Control Panel\International\CustomLocalesNoSelect