The Tongan Alphabet

Tongan is the Polynesian language ^[1] of the Kingdom of Tonga, a Pacific island nation of 171 islands east of Fiji. With approximately 105,000 speakers, Tongan is spoken throughout Tonga and in diaspora communities in New Zealand, Australia, and the United States. It is the sole official language of the Kingdom of Tonga.

Tonga is notable as the only Polynesian nation never formally colonised by a European power — it was a British protectorate from 1900 to 1970 but retained its own monarchy. This independence has supported the vitality of the Tongan language. King George Tupou I, who unified the kingdom in the 19th century, also commissioned the first Tongan Bible translation and promoted widespread literacy in Tongan.

The ʻokina (ʻ) is one of the most important characters in the Tongan writing system ^[1]. Written as a turned comma (reversed apostrophe), it represents the glottal stop — the sound made by briefly closing the vocal cords, like the catch in the middle of the English "uh-oh". In Tongan, the ʻokina is a full phonemic consonant, meaning it changes word meaning when present or absent.

Examples: ʻaho (day) and aho (a plant fibre) are different words. The ʻokina must be written correctly in Tongan — omitting it is a meaning error, not merely a spelling error. The glottal stop is shared with Hawaiian (also written as a turned comma) and several other Polynesian languages where the sound is phonemic. Understanding the ʻokina is essential to reading and writing Tongan accurately.

Tongan belongs to the Tongic branch of the Polynesian family ^[2], part of the vast Austronesian language family. The Tongic branch consists of only two languages: Tongan and Niuean. This branch diverged from the ancestor of all other Polynesian languages earlier than any other surviving branch — making Tongan linguistically more distant from Samoan, Hawaiian, and Māori than those languages are from each other.

Tongan shares the characteristic Polynesian features: a 5-vowel system, an open syllable structure (no consonant clusters in native words), a similar basic vocabulary reflecting the shared Polynesian origin. However, Tongan also has distinctive features not found in other Polynesian languages — including a more elaborate verb particle system, a formal chiefly register with its own vocabulary, and a richer consonant inventory including the letter S (absent in Tuvaluan and Tokelauan).

Tongan's 17-letter alphabet is larger than Tuvaluan (15 letters) or Tokelauan (15 letters) ^[1] due to a larger consonant inventory. Unlike Tuvaluan and Tokelauan, Tongan includes the letters S and H as consonants, and it uses the Ng digraph for the velar nasal. The most distinctive feature, absent in Tuvaluan and Tokelauan, is the ʻokina (ʻ) representing the phonemic glottal stop.

Tongan also distinguishes vowel length with macrons (ā, ē, ī, ō, ū) — long vowels that are phonemically distinct from short ones. Tuvaluan and Tokelauan do not use macrons in their standard orthographies. These differences reflect Tongan's place in the Tongic branch of Polynesian, which retained some features of Proto-Polynesian that were lost or simplified in the Nuclear Polynesian languages (Samoan, Hawaiian, Māori, and their relatives).

Tongan is the vehicle of a sophisticated royal and oral literary tradition ^[1]. The most celebrated cultural form is the lakalaka — a choral performing art inscribed on the UNESCO Representative List of Intangible Cultural Heritage of Humanity. Lakalaka combines formal poetry (hiva kakala, or sweet songs) with graceful standing dance, performed by groups of men and women with elaborate coordinated arm movements.

Tongan society maintains a complex system of social rank and register: the language used when speaking to or about the royal family (and to nobles) differs substantially from everyday speech. The anga fakatonga (Tongan way of life) — encompassing values of respect, reciprocity, and communal obligation — is expressed and transmitted through the Tongan language. The Christian church (predominantly Methodist and Catholic) conducts services in Tongan and has been a major supporter of Tongan literacy since the 19th century.