well, seeing as all of the languages created by Tolkien were extremely limited in vocabulary (elvish being the most advanced in his creations), whatever is out there is probably about as accurate as it gets. Our version of elvish here is a combination of sindarin, quenya, as well as our own words. How the words in our dictionary arn't exactly the same as Tolkien's, they are derived from what he made. Honestly, I prefer what we have here over anything he wrote down as a stand alone language. I find that ours has a much larger selection of vocabulary (though still limited in some aspects.)So anyway, now to your actual question. I've used this site for resources quite often: http://www.geocities.com/almacq.geo/sindar/sdintro.html I wonder if anyone else has something that might be superior. I guess they'll post here if they have something, but most of the time we focus on the RP aspect over cramming full of linguistical knowledge (though i have quite the obsession with languages). I hope this helps out. If you have any more questions ICQ me at 12487293 make sure you put where you got the number or i'll just ignore the message. Vanya sulie (fair winds).
-Therfalas