Is it possible for Luzon to be primarily Ifugao speaking, the Ifugaos have a similar habitat as the Tagalogs - they lived in a hilly area and assimilated low landers in Central Luzon, is it possible for Ifugaos to do what the Tagalogs did and assimilate the Tarlac-Nueva Ecija-Eastern Pangasinan areas and also have a majority prescence in Manila?