Tongan (English pronunciation: ˈtɒŋən or ˈtɒŋɡən; lea fakatonga) is an Austronesian language of the Polynesian branch native to the island nation of Tonga. It has around 187,000 speakers. It uses the word order verb–subject–object.
Tongan is one of the multiple languages in the Polynesian branch of the Austronesian languages, along with Hawaiian, Māori, Samoan and Tahitian, for example. Together with Niuean, it forms the Tongic subgroup of Polynesian.
Tongan is unusual among Polynesian languages in that it has a so-called definitive accent. As with all Polynesian languages, Tongan has adapted the phonological system of proto-Polynesian.
Tongan has retained the original proto-Polynesian *h, but has merged it with the original *s as /h/. (The /s/ found in modern Tongan derives from *t before high front vowels). Most Polynesian languages have lost the original proto-Polynesian glottal stop /ʔ/; however, it has been retained in Tongan and a few other languages including Rapa Nui.
In proto-Polynesian, *r and *l were distinct phonemes, but in most Polynesian languages they have merged, represented orthographically as r in most East Polynesian languages, and as l in most West Polynesian languages. However, the distinction can be reconstructed because Tongan kept the *l but lost the *r.
Tongan has heavily influenced the Wallisian language after Tongans colonized the island of ʻUvea in the 15th and 16th centuries.
The earliest attempts to transcribe the Tongan language were made by Willem Schouten and Jacob Le Maire of the Dutch East India Company when they first arrived in 1616. They transcribed a limited number of nouns and verbs using phonetic Dutch spelling and added them to a growing list of Polynesian vocabulary. Abel Tasman, also of the Dutch East India Company, attempted to converse with indigenous Tongans using vocabulary from this list when he arrived on Tongatapu on 20 January 1643, although he was poorly understood, likely using words added from different Polynesian languages.
Tongan is presently written in a subset of the Latin script.