The Praseo language is the language spoken in the environs of the city of Prasa. It exists in a variety of dialects which extend from the Bounded Sea, along both the north and south shores of the White Mouth Bay, and along the south shore of the River Prasa all the way to Azatsi's Fingers. (These locations can be seen on map of the locations mentioned in the novel Storm Bride.) The dialect of the city of Prasa was the de facto standard dialect, and is the one documented here.
A very early form of Praseo is spoken by the characters in Storm Bride.
The major grammatical features of Praseo are documented on their own pages:
History of the Praseo language
Yeah, this is pretty much just TODO