Alright, who did this? (Found in the "materials" skill lesson)
I was just starting the last third of the materials skill lesson in the German tree when suddenly... (I hope this doesn't bother anyone, I just found it somehow funny)
Note: this is a real screenshot
I believe it's automated.
There are other picture errors in the courses, for example when "wood" has the wrong picture supplied - the forest type of wood rather than the material type of wood, or vice versa. (Which suggests the server searches on the English word at least some of the time when obtaining a picture.)