East Malaysia is 50% bigger than Peninsular Malaysia at , comparable with South Dakota or Great Britain. East Malaysia contains the five highest mountains in Malaysia, the highest being Mount Kinabalu at 4095 m, which is also the highest mountain in Borneo and the 10th highest mountain peak in Southeast Asia. It also contains the two longest rivers in Malaysia – Rajang River and Kinabatangan River. Banggi Island in Sabah and Bruit Island in Sarawak are the two largest islands that are located entirely within Malaysia. The largest island is Borneo, which is shared with Indonesia and Brunei. The second largest island
Languages of Brunei Languages of Brunei There are a number of languages spoken in Brunei. The official language of the state of Brunei is Standard Malay, the same Malaccan dialect that is the basis for the standards in Malaysia and Indonesia. This came into force on 29 September 1959, with the signing of Brunei 1959 Constitution. Malay is specified as the national language of Brunei in the constitution of 1959, and its central role in the country is reinforced in the national MIB philosophy ("Melayu Islam Beraja", 'Malay Islamic Monarchy'). While the variety of Malay that functions as the national language is not