I have 2 issues:
1) I believe this is a bug... In GPMC using RSAT tools for windows 10 or GPMC on Server 2012 R2 I navigate to User Configuration->Preferences->Windows Settings->Registry and attempt to create a new Registry item.
I can create the item and target to:
HKLM\CurrentControlSet\Control\MUI\Settings the REG_MULTI_SZ item is PreferredUILanguages
Here I can see the top selected language present. If I change it, it would be the alternative.
I'm working with en-CA and fr-CA.
Then when I use the Common tab and select Item-Level targeting, I select User Item languages and cannot select the language I need which is English (Canada) and French (Canada). The choices aren't there despite both being installed on my system.
2) I need to automate the OS or System language following the UI language. I'm aware that there is a setting to do this called Copy settings in the advanced settings of the languages control panel applet. The operation when done manually requires elevation which is why I'm configuring a GPP to do it.
Does this seem right?