I think I've got a couple of pretty amazing ideas.
First, about the language files. I don't think anyone associated with Dwarf Fortress would even consider a language as dwarven if it didn't contain the word "Urist".
Having thought of that, I did some manipulations to the word and decided that due to high reverberation the ending "st" would fuse into a single sound, that is, a diphthong. Then I looked at the language file and found that there's a good number of words in "st", but also, words ending in "st"-like sounds - "s", "th", "z". I think it may be an interesting idea to introduce some assimilation, by which, as "st" is, I think, the strongest of these sounds, the rest would in speech be replaced by it, and later maybe even in writing.
Then, my attention was attracted by "ur" in "urist". At first I tried to do something to phonology, but then, I remembered my other favourite word (after your fascinating performance) - "bobrur" which means "mother". I saw that there's that letter combination again. From my acquaintance with the studies of Proto-Indo-European language, I thought that it might have some meaning. I needed to look at more words to verify if it's significant, but that was at the University. Now I've returned home and indeed, we've got "urem" - "father". There's a significant number of words where "ur" occurs in the ending position. Wait... there's even such word - "ur" and it means "hearth". It occurs to me that it may be too early to discount Toady's and Threetoe's linguistic efforts, because if these words were random, it would be just uncanny. Of course, against this immediately stands the fact that one out of ten words ends in "ur", at least in later section. But if we agree that at least "urist" is important, then we've got a direction to work in.
Also for consideration, a male word "father" begins with "ur", and a, what I've always considered, male word "urist" begins with "ur", but a female word "mother" ends with "ur", and a word "hearth" that doesn't have an apparent gender in any sense of the word, but has an obvious connotation, is "ur" itself.