Freeedoooom!
Although Azeroth is a very cheesy place, out of respect for my ancestors (being a mongrel is fun), I wanted to do a bit of research for Project Cow Level to try to use reasonably authentic Scottish dialect (as the story centers on a mostly dwarven team of prospectors). In my initial research, I was surprised to find that the stereotypes appear to come from both the Scottish English dialect and the Scots Anglic language, which I didn't even know existed. Furthermore, I'm not sure all of the contributors on Wiktionary know either-it lacks much in the way of sourcing or discussion, the two chief balancing factors for Wikipedia. I really don't want to have to read an actual book, so I'll probably just fake it.
Another option is to play a Dwarf in The Hobbit, in which case I'd get a dialect coach. My brother suggested this back when the live-action LOTR movies came out, because he claims we have disproportionately large heads. Of course, it might take some extra prosthetics to make me look like I'm not half-Easterling. (Being a mongrel is fun.) There are also these, but I doubt 35 minutes of coaching would let me master the vernacular to any great degree.