The Ratagnon Alphabet

Ratagnon (also called Datagnon and Latagnun) is a critically endangered Philippine language ^[1] spoken in Occidental Mindoro, an island province in the western Philippines. With fewer than 100 estimated remaining speakers, Ratagnon is one of the most endangered languages in the Philippines. The language is spoken by members of the indigenous Ratagnon community in a small area of Mindoro, where it has been increasingly displaced by Tagalog, other Philippine languages, and English.

The language is known by three names — Ratagnon, Datagnon, and Latagnun — all referring to the same speech variety with ISO 639-3 code btn. These alternate names have been used by different communities, researchers, and sources. Occidental Mindoro is home to multiple indigenous Mindoro language groups, collectively known as Mangyans, though Ratagnon is not usually classified as a Mangyan language — it belongs to a distinct subgrouping of Philippine languages. The critically endangered status of Ratagnon makes documentation efforts urgent.

Ratagnon uses the Latin alphabet ^[1] with 20 letters: 5 vowels (A, E, I, O, U), 14 consonants (B, D, G, H, K, L, M, N, P, R, S, T, W, Y), and the Ng digraph representing the velar nasal consonant. The Latin alphabet was introduced to the Philippines during the Spanish colonial period and later standardised under American colonial administration. As with other Philippine indigenous languages, Ratagnon was historically passed down orally rather than in writing.

The writing system used for Ratagnon in linguistic documentation follows the conventions of Philippine Latin orthography, similar to those used for Tagalog and other Philippine languages. Academic documentation of Ratagnon has produced wordlists and grammatical sketches that use this Latin orthography. The pre-colonial Baybayin script, which was historically used for major Philippine languages like Tagalog, may not have been used extensively for Ratagnon given the language's location and small speaker community.

Ratagnon belongs to the Malayo-Polynesian branch of Austronesian ^[2] — the same vast family as Tagalog, Cebuano, Indonesian, Hawaiian, and hundreds of other languages across Southeast Asia and the Pacific. Within Philippine Austronesian, Ratagnon is classified as one of the Mindoro languages, a group of Austronesian languages spoken on Mindoro island that form a subgroup within the Philippines linkage of Malayo-Polynesian. The Mindoro languages include Hanunuo, Buhid, Alangan, Tadyawan, Iraya, and others.

Ratagnon's position within the Mindoro language group reflects the ancient settlement of Mindoro island by Austronesian-speaking peoples as part of the great Austronesian expansion across the Indo-Pacific starting approximately 4,000-5,000 years ago. The relative isolation of different Mindoro communities over centuries led to the development of linguistically distinct languages despite geographic proximity. The documentation of Ratagnon is important for understanding the full diversity of Philippine Austronesian languages and the history of the Mindoro language subgroup.

Ratagnon is critically endangered due to language shift ^[1] — the process by which a community gradually adopts a more dominant language for daily communication, education, and economic activity. In the case of Ratagnon, speakers have shifted to Tagalog (the national language of the Philippines) and other regional languages over the course of the 20th century. Factors driving this shift include the dominance of Tagalog in education and media, economic incentives to speak more widely used languages, intermarriage with speakers of other languages, and the loss of traditional social structures that supported the use of the indigenous language.

Efforts to document and preserve Ratagnon include linguistic fieldwork by researchers at Philippine universities and international institutions, which has produced written records of Ratagnon vocabulary and grammar. These documentation efforts are part of a broader global movement to document endangered languages before they become extinct. However, the language revitalisation challenge for Ratagnon is significant given the very small remaining speaker community and the socioeconomic pressures that led to the original language shift.

Ratagnon is known by three names: Ratagnon (the name most commonly used in academic linguistic literature), Datagnon, and Latagnun ^[2]. All three names refer to the same language variety with ISO 639-3 code btn. Different sources and communities have used different names for the language, leading to the appearance of three separate languages in some databases, though they are all the same speech variety. The variation in names reflects differences in how the language name was recorded or transliterated by different researchers and community members at different times.

On EveryAlphabet.com, we present all three names (Ratagnon, Datagnon, and Latagnun) as separate pages to ensure that users searching for the language under any of its names can find the relevant information. All three pages reference the same SIL Ethnologue and Glottolog entries for the Ratagnon language (ISO 639-3: btn), and the alphabet information is identical across all three pages since they describe the same language.