In the mod, I discarded all Sindarin and Quenya references, and decided to go Modern English, including in Speech and Names ^^;; I have no intention to use Tolkien's Language, since I always felt it catered more to hard-core Tolkienists rather than General Fans and General Tolkien Fans, which is what this mod is really aimed at.
That's not so true. Part of the world is the language. Middle Earth was created (I'm pretty damn sure) because Tolkien needed a place to put Elvish. I personally enjoy the languages. It isn't so hard to put in simple references to them while writing--single words and such. The people can speak the Common Tongue, and then lapse into their native one when they're emotional. If an author took the time to create languages (though it can be argued that Tolkien only adapted/manipulated/plaguized and did not create his languages) they should be used in recreations of his work.