If you want I could try making a separate language file that used the Quenya elven language, that is only if you want/plan to add in the separate groups of Elves however, otherwise it's not really needed. Also it would be neat, but not overly missed if you want to keep the races/factions simple which would be understandable, to see more of the human groups that followed Sauron than just the Easterlings, there were also the Horsemen of Rhun, the Corsairs of Umbar and the Black Numenoreans of Mordor.
Other than my random ideas being thrown at the wall, I like the mod so far, and Tolkien has always been a big addiction of mine, I've read the encyclopedia, the Silmarillion, and all of the books (obviously). So it's great to see one of my addictions being added into another of mine in a pretty decent, albeit early stage, mix.