Bubb

The language of the seafolk along the coast of Noress.  Unspoken with mouth, head, and eye movements for the finer communications, but less formal speech tends to be a lot more active and imprecise, "louder", with full on pantomiming for storytelling and emotional communication. When listened to, it's said to sound like trickling water as the people speaking would pop their lips with the motion that gave the language its name--"bubb". 
The mouth is seen to open tall, wide, or round (ah, ee, and oo, spelled a, i, and u), the lips are seen to press, spread, or fold (b, v, and m), and can be seen to trill (bb) (So, yeah, the language is named boobs ending in a raspberry, I'm sorry, I named it and then I translated it and I can't change it just because it sounds stupid in the only language I speak, it's never actually said aloud and sounds more like a three-month-old playing with their lips)
It eventually developed a written form after a couple thousand years of existing, as the blasted land-dwellers insisted. It has maybe ten letters, I'll add it later when I look it back up.