Autopilot change the operating systems default installed language

For anyone that needs this. Unless you are still deploying windows 10 and Microsoft doesn't allow the new "Copy-UserInternationalSettingsToSystem". And, Microsoft doesn't let us install an LP with PS like what I found they are testing in the Insider Builds. Do the following:

(This is based on https://github.com/mtniehaus/AutopilotBranding

1. Get the required LPs
2. Create a Win32 app that which contains the following - LPs + xml for the intl.cpl copy international and a script that:
   1. installs the LPs + Languages capabilities.
   2. Set timezone
   3. Set system locale
   4. Set culture.
   5. Set windows geo location
   6. Set user language list
   7. Copies the international settings to system and new user using the xml file.

I hope this helps anyone with this issue, and thanks shehanjp  for the answers. They pointed me in the right direction.

Rahamim.