/fr/informatique-et-internet-c13-p1.html
  (8) Undefined index: lang   SiteListModel.php   line 266     19-9-17   23:08
FrontController->dispatch() # line   17, file: /var/www/netref.info/index.php
  call_user_func_array(Array[2], Array[3]) # line  220, file: /var/www/netref.info/core/FrontController.php
    SiteController->categoryAction("13", "informatique-et-internet", "1") # line    0, file: unknown
      SiteListModel->getValidatedSitesInCategory("13", "1") # line  145, file: /var/www/netref.info/controllers/SiteController.php