The Tonga Alphabet

Tongan is the Polynesian language ^[1] of the Kingdom of Tonga, a Pacific island nation consisting of 171 islands (36 inhabited) located east of Fiji and south of Samoa. With approximately 105,000 speakers, Tongan is spoken throughout the Kingdom of Tonga and in significant diaspora communities in New Zealand (particularly Auckland), Australia, and the United States. Tongan is the sole official language of Tonga.

Tonga is the only Polynesian — and one of the few Pacific — nations never formally colonised by a European power. While it became a British protectorate in 1900, the Kingdom retained its own monarchy, government, and legal system. This political independence has supported the vitality of the Tongan language and culture, which have developed with less colonial disruption than most Pacific languages. King George Tupou I, who unified the kingdom in the 19th century, also promoted Tongan literacy and had the Bible translated into Tongan.

The ʻokina (ʻ) is one of the most distinctive features of the Tongan writing system ^[1]. Written as a turned comma (a reversed apostrophe), it represents the glottal stop — a sound made by briefly closing the vocal cords, similar to the catch in the middle of the English expression "uh-oh". In Tongan, the ʻokina is a fully phonemic consonant: changing or removing it changes the meaning of a word.

For example, ʻaho (day) and aho (a type of plant) are entirely different words. Similarly, faka and fakaʻ have different meanings. This means that in Tongan, the ʻokina must be written correctly — omitting it is not just a spelling error but a meaning error. The ʻokina is shared with Hawaiian (where it is also written as a turned comma) and with some other Polynesian languages where the glottal stop is phonemic.

Tongan belongs to the Tongic branch of the Polynesian language family ^[2], within the larger Austronesian family. The Tongic branch — which includes only Tongan and Niuean — is the most divergent branch of Polynesian, meaning Tongan separated from the ancestor of all other Polynesian languages earlier than any other surviving language. This gives Tongan some features not found in other Polynesian languages.

All other Polynesian languages (Samoan, Hawaiian, Māori, Tahitian, Tokelauan, Tuvaluan, Marquesan, etc.) belong to the Nuclear Polynesian branch, which diverged later. As a result, while Tongan shares much of the basic Polynesian vocabulary and grammar, it also has distinctive features such as a complex system of verb particles, an elaborate register system (formal, everyday, and chiefly speech), and a richer consonant inventory than many other Polynesian languages.

Tongan is the medium of a rich and sophisticated oral and literary tradition ^[1]. The most prominent cultural form is the lakalaka — a standing dance performed in a group while reciting or singing elaborate poetry (hiva kakala). The lakalaka is inscribed on the UNESCO Representative List of the Intangible Cultural Heritage of Humanity. The poetic language of lakalaka is highly allusive and metaphorical, requiring deep cultural knowledge to fully appreciate.

Tongan society maintains an elaborate system of social rank (ranging from the king down through nobles and commoners) that is reflected in the language through distinct registers and honorific vocabulary. Speaking appropriately to people of different social ranks requires knowledge of which words are appropriate for each context. The Tongan Bible (translated in the 19th century) has been a major force in standardising written Tongan and promoting literacy across the Kingdom.

Tongan has a moderately complex phonological system ^[1] by Polynesian standards. It has 10 consonant phonemes (f, h, k, l, m, n, ŋ (ng), p, s, t, v) plus the glottal stop (ʻ), and 5 vowels (a, e, i, o, u). Crucially, Tongan distinguishes vowel length: each of the five vowels has a short and a long version (written with a macron: ā, ē, ī, ō, ū), and the distinction is phonemic — that is, it changes meaning.

Like other Polynesian languages, Tongan has an open syllable structure: no consonant clusters are permitted in native words, and every syllable ends in a vowel. However, Tongan is less strict than Tuvaluan or Tokelauan in that it has a greater range of consonants and a richer vocabulary. Tongan uses S where Tuvaluan does not, and has more consonant phonemes overall. Word stress in Tongan generally falls on the penultimate (second-to-last) syllable, with long vowels and word-final syllables also receiving stress.