Complex sentence: Tetum (also Tetun) is an Austronesian language of Belu Regency in West Timor, and across the border in East Timor, where it is one of the two official languages.
Split into simpler sentences: Tetum (also Tetun) is an Austronesian language spoken on the island of Timor. It is spoken in Belu Regency in Indonesian West Timor, and across the border in East Timor, where it is one of the two official languages.