Errata inserted facing t. p. Bibliography: leaves 406-457. A comparative investigation of language usage and language attitudes in relation to Filipino/Tagalog, Philippine languages other than Tagalog and English among senior high school students and their parents in two countries, the Philippines and Australia. The study provides an historical overview of the development of national language policies in Australia and in the Philippines, focussing on the way in which multiculturalism in Australia influenced language policies, and on the reasons for the adoption of the Bilingual Education Program in the Philippines.