title: default languages for items and folders in sitecore
body: <p>I'm working in a multi-site, multi-lingual sitecore project, and from time to time, someone adds lots of content on certain sub-site, fight hours with the publishing and being unable to see the updated content, and eventually realise after a couple of hours that all the input was in the wrong language for the sub-site.</p>
  
  <p>So i'm wondering if there is a way in sitecore to support the following:</p>
  
  <ul>
  <li>a folder (for a sub-site) that supports that after clicking an existing item below it, the language automatically changes to the default language for the site folder</li>
  <li>since the language is automatically changed, new items created below that folder will be created in the default sub-site language, unless the user explicitly changes it to something else</li>
  </ul>
  
  <p>If the above is impossible or not supported, an excellent workaround would be to be able to change the language of an item language version (say, i created an english version for a page on a spanish site with all the content in spanish, so i want to tell sitecore that i want to make this version actually the spanish version, without going into copying fields manually in the translate ui</p>