Hey Varg. We use Gruk. I try and pick up all I can from the other Orc guilds that I have encountered. If I write stories I will sometimes refer to the Red Hand website Burz posted, I am not strict with the black speech but I use it on occasion, especially if I cannot think of a way to butcher the English language into my own brand of Orcish. You will find that our language is simplified and really it helps the new Orcs find their way and immerse themselves into RP quickly without a steep learning curve. It also in my opinion makes insulting humans much more effective as they can understand that they are getting trash talked to. Also, it is quite universal, as I can go to any Orc clan and they can understand me and I them. I have made Orcs with Shadowclan and Boulderfist and I have found that our language mirrors Shadowclan for the most part.