Yes, and like oceanlord said, all languages. If you've played WoW or other MMOs then hopefully you know what role you play and how to play it. Just assume they also know, and if it looks like the tank is hesitating, recommend the first basic steps like marking and holding aggro, etc.
The DF queue/waiting screen will pop over to your quest log on the right hand side of the screen, where you can click on it to see how many people it has found so far, how long you've been waiting, and the average wait time.
