The Northern Luzon languages ( also known as the Cordilleran languages ) are one of the few established large groups of languages in and around the Cordillera Central of northern Luzon in the Philippines .
The Northern Luzon languages ( also known as the Cordilleran languages ) are one of the few established large groups within Philippine languages . 
 These are mostly located in and around the Cordillera Central of northern Luzon in the Philippines .