title: TYPO3 9.5: use content-fallback mode for single pages / override site-configuration
body: <p>is it possible to define content-fallback mode for a single page f.e.g via an extension-template and typoscript or is the language-mode definitifly a site-wide configuration that can not be overriden via typoscript ?</p>
  
  <p>Thanks a lot !</p>