Bethesda have released an official list of English voice commands for Skyrim with this update, of which there are over 200. You needn't speak native Dragon, just 'Unrelenting Force' will do.
The Dragon Shouts aren't the only thing you can scream at the game but also companion commands, bartering, item navigation, browse skills, assign hotkeys and more.
French, Italian, German and Spanish versions of the Kinect update will be releasing later as they're still in the testing phase. "We'll share those dates as soon we know them," said Bethesda. For the full released manual to the Kinect voice commands in English you can download the newly released PDF from the official website.