title: Set the region format setting to "Match Windows display language" programmatically
body: <p>I'm looking for a way to set this option by using a batch or PS script. 
  While adding a new language to the registry key is super easy <code>REG ADD "HKCU\Control Panel\International" /t REG_SZ /v LocaleName /d en-EN /f</code> I didn't find any references on how to set the key to match the display language. I assume that this is a Windows Feature only and not bound to a key. </p>
  
  <p><a href="https://i.stack.imgur.com/2Vksq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/2Vksq.png" alt="enter image description here"></a></p>
  
  <p>So do I really need to read out the Display Language Key <code>reg query "HKLM\SYSTEM\CurrentControlSet\Control\MUI\UILanguages"</code> first or is my assumption wrong and their really is a universal key to set it to the display language?</p>