Primordial Languages

The Primordial Languages derive from the fundamental language of the elements. The root language is High Primordial, which unliek Ur-Titanic or Old High Draconic is the complete, living language of elemental beings, including genies and other intelligent elementals. High Primordial has four dialects - Auran, Aquan, Pyran and Terran - which share syntax, grammar, vocabulary and written forms, but with radically different phonetic structures, depending on each element's natural sounds.
The phonemes of High Auran range from whispers to howls, but lack stops and sharp definitions. High Aquan is formed from the deepened, amplified sounds beneath the water, blending long, sonorous notes and sharp clicks and whistles. High Pyran is a language of hisses, pops and crackles. High Terran rumbles and booms and cracks, and can stretch even individual phonemes over several minutes.
There are four subfamilies of Primordial.

Low Primordial

Low Primordial languages are an approximation of High Primordial that can be pronounced by the mortal tongue. They are used by genasi, seafolk, aarakocra and other mortals who need to communicate regularly with High Primordial speakers.
Low Auran languages use more stops than High Auran, but are notable for their sibillance and aspirants. Low Aquan uses a higher, quicker form of the deep, elongated sub-surface sounds of its High root. Low pyran incorporates a large number of clicking and whistled phonemes.
The most common language derived from Low Primordial is Genasan, the language of the Genasi. In addition to the same four elemental variations as in oher primordial languages, there are distinct dialects used by genasi in northern and southern Caino, and on the Cloud Shore and south-east coast of Suto. Among the Genasi, elemental variations are usually used in a utilitarian manner: Auran is used for both correspondence and poetic composition; Aquan is used for trade and storytelling; Pyran is typically used for giving orders or describing strategy, but is also used for mathematics and recording formulae of all kinds, including recipes; and Terran is a language of precise and definite declarations, favoured for technical discussion and formal announcements.

Sea Speech

Like the Seafolk themselves, the languages of the ocean are drawn from a wide variety of roots. Most have an aquan base, with deep sounds and long vowels, but also borrow heavily from squalori and Ladonian, and even contain elements of giant. There are three main dialects, and many more nuanced variations.
Shore Speech draws most heavily on low aquan and other surface languages, and of the three dialects is the most easily recognised as language by land-dwellers. It is most commonly used by tritons, sea elves and ocean-going traders of all species.
Wave Speech is sometimes considered a separate dialect of low aquan, but the syntax and grammar are distinctly elven. Phonetically it uses primarily long vowels and glottal stops for ease of speech in water. This is the language of merfolk and sahuagin.
Trench Speech is based on high aquan, and is not only nearly impossible for land-dwellers to pronounce, it uses such low pitches that it is only readily audible to anyone in the deepest ocean. Trench speech is mostly used by sahuagin, but the merrow communicate using a subsidiary dialect which blends this language with deep speech.

Dust Tongues

Largely based on the Terran variation, the Dust Tongues are spoken by the Greatfolk of Aiaos. There are four principal Dust Tongues: Minotaur, Mastandan, Mathomish and Dentaur.

Sono

Sono is the Featherfolk language, and while the only language in its branch, is one of the richest and most intricate languages of all the Aiaosian tongues. It also forms the basis for Aerian, a simplified version that is one of the major forms of Common Languages.