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Force selected system UI language to overwrite the user UI language
GPO PowerShell Regedit CMD
Not Configured - No registry values are specified. Disabled - Any values that would be created by the policy in the registry are deleted. Enabled - Adding, modifying or delete values in the registry. Force selected system UI language to overwrite the user UI language can be found in the Group Policy.  Please navigate to Computer Configuration - Policies - Administrative Templates - Control Panel - Regional and Language Options folder.