Disallow selection of Custom Locales

This policy setting prevents a user from selecting a supplemental custom locale as their user locale. The user is restricted to the set of locales that are installed with the operating system. This does not affect the selection of replacement locales. To prevent the selection of replacement locales adjust the permissions of the %windir% -> Globalization directory to prevent the installation of locales by unauthorized users. The policy setting “Restrict user locales” can also be enabled to disallow selection of a custom locale even if this policy setting is not configured. If you enable this policy setting the user cannot select a custom locale as their user locale but they can still select a replacement locale if one is installed. If you disable or do not configure this policy setting the user can select a custom locale as their user locale. If this policy setting is enabled at the machine level it cannot be disabled by a per-user policy setting. If this policy setting is disabled at the machine level the per-user policy setting will be ignored. If this policy setting is not configured at the machine level restrictions will be based on per-user policy settings. To set this policy setting on a per-user basis make sure that you do not configure the per-machine policy setting.

Additional Information

  1. Registry path is:

    HKEY_LOCAL_MACHINE -> Software -> Policies -> Microsoft -> Control Panel -> International # CustomLocalesNoSelect

  2. The Administrative Template path is:

    System -> Locale Services


* Making mistakes while changing registry values can affect your system adversely. We recommend you to create a System Restore point before making registry manipulation. If you're new to Registry Editor, read this beginner's guide.
** To locate the registry and administrative template path, checkout beginner's guide.
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