, Tausug , Waray-Waray [2] Voluntary and optional languages Spanish and Arabic National language Filipino Demonym Filipino or Pinoy Government Unitary presidential constitutional republic  -  President Gloria Macapagal-Arroyo  -  Vice President Noli de Castro  -  Senate President Juan Ponce Enrile  -  House Speaker Prospero C. Nograles  -  Supreme Court Chief Justice