Gothic II Easter Egg - Hidden Sign (Plot spoiler possible)

In the Valley of Mines, the orc invaders have built a high palisade wall blocking the view of the harbor from the paladins holding the castle. An NPC in the game claims the orcs built the wall to hide the scale of the invading horde, said to be numerous.

If you have your character climb the wall, you find an empty stretch of rolling land, and a single sign. The message contains numerous misspellings, probably from having been translated into English, and is signed Alien Dwarf. The sign congratulates you on getting this far, and confirms that there's no invading horde behind the wall.