The phrase Klingon Teacher from Germany is a description that Lieven L. Litaer uses when teaching the Klingon language in his YouTube videos. These videos were created as a commercial for a computer game called Star Trek Infinite Space. The game was never published, but Lieven continued his lessons.
Lectures
When Lieven holds a talk about Klingon language, he usually does it in Klingon disguise wearing a tuxedo. For a list of lectures, see the page about Lieven.