Talking like a Dwarf
What I meant by "Tolkienesque" is that the names and cultures of certain races in my D&D3.5 homebrew campaign setting resemble those used in the Middle Earth books. As for talking like a "Star Trek" Ferengi, imagine a 3-foot-tall Goblin with snaggle teeth, large ears, and a bad attitude mixing obsequiousness and barely concealed hatred.
I tend to tie each demihuman type to the folklore they came from, hence Elves=Celtic, Dwarves=Norse, and Gnomes=Central European, but I also have human nations similar to each of those, so I've tweaked them a bit. Thus, my Viking-style humans get along well with their Slavic Dwarven neighbors. Similarly, the Anglo-Saxon-style humans have some affinity for their Celtic Elven neighbors...
As for writing Dwarven sentences, I'd make them direct, harsh, and strong. While an Elf might say, "Greetings, friends. It is pleasant indeed to find you under our fair glade," a Dwarf would grumble, "Hail, stranger. What business do you have in Rockburg?"