Proto-Malayo-Polynesian language
Proto-Malayo-Polynesian (PMP) is the reconstructed ancestor of the Malayo-Polynesian languages, which is by far the largest branch (by current speakers) of the Austronesian language family. Proto-Malayo-Polynesian is ancestral to all Austronesian languages spoken outside Taiwan, as well as the Yami language on Taiwan's Orchid Island.
Source: Wikipedia — Proto-Malayo-Polynesian language (CC BY-SA 4.0)