One of the challenges for David Peterson was to 'retrofit' the languages he created to what Martin had already made up. He coined a bunch of words and phrases for the books, and those needed to make sense and be grammatically correct in the newly created languages.
The phrase "valar morghulis", meaning "all men must die" in High Valyrian is a nice example. Peterson made the -ar suffix indicate the collective number. This is expressed by 'all' in English, but in many languages this is a separate number from singular and plural. He also added a paucal number (meaning "a few"). vala (man), vali (men), valun (a few men), valar (all men).
Still if you are ever looking to create your own fantasy series on a shoestring, maybe my idea has merit...
Early in Game of Thrones when Khaleesi (sp?) hooked up with the Dothraki warrior guy ("you are my moon" etc.) I would infuriate the office GoT geek by my inability to remember any of the names in general, and my humorous (to me) habit of referring to said warrior as "the Klingon dude" in particular. To me if he looks like a Klingon and sounds like a Klingon...
"Your audience is lazy" is rule number 2 or 3.