A linguistic time capsule
On the rugged volcanic islands of the Marquesas, a unique linguistic situation shows the deep past of Polynesian languages. The local languages, known as Marquesan, are a collection of dialects belonging to the Eastern Polynesian language family. They are broadly divided into two groups: North Marquesan ('Eo 'Enana) and South Marquesan ('Eo 'Enata). While closely related, these groups show distinct phonological traits.
The ancestor of all Polynesian languages is a reconstructed language called Proto-Polynesian, believed to have been spoken around 500 BCE in the Tonga-Samoa region. As Polynesians migrated across the Pacific, their languages evolved and changed. Most Eastern Polynesian languages, such as Tahitian and Hawaiian, underwent a series of sound shifts. The Marquesan languages, however, resisted some of these changes. This conservatism makes them exceptionally valuable for historical linguists, as they retain sounds that have been lost or altered in nearly all their relatives. They act as a living reference point for reconstructing the sound system of Proto-Polynesian.
The case of the consonants
The most notable archaic feature of Marquesan is its treatment of consonants inherited from Proto-Central-Eastern Polynesian (PCE). One of the clearest distinctions between North and South Marquesan involves the PCE consonant *f. South Marquesan retains this sound, similar to Tahitian. For example, the word for "house" is fa'e in South Marquesan. In North Marquesan, however, the *f sound shifted to an /h/, making the word for house ha'e.
Another important feature is the glottal stop, written as ʻ (the ʻokina). The glottal stop is a consonant sound produced by obstructing airflow in the glottis. In Marquesan, the glottal stop almost universally replaces the /r/ or /l/ sound found in other Polynesian languages. For example, the dual pronoun "you two" is koʻua in Marquesan, while its cognate in Tahitian is ʻōrua, showing the replacement of /r/ with /ʔ/.
The vernacular of 'Ua Pou island in the north is particularly conservative; it has retained the PCE consonant *k, which was replaced by a glottal stop in all other Marquesan dialects. For instance, the word to "see" or "know" is kite on 'Ua Pou, but 'ite on Nuku Hiva and Hiva 'Oa. These preserved sounds allow linguists to trace the step-by-step evolution of the entire language family.