There are apparently two versions of Adunian. The original, which is fragments of it, posted by Owl forever ago; and a new version of Adunian created by Chikaea a long time ago, too.
When I first joined the server, my character would speak a hybrid of the two. I'm sure the posts can be located by searching for a bit. This trivia is just off of my old word doc notes.
Edit:
I did a bit of digging on my SSD and I located a bunch of PDF files. One contains Adunian Grammar and Phrases, the other a short Common-Adunian Dictionary. I also appear to possess an updated private copy of the Jolfmarr'tal Dictionary from 2017.