Continuity mistake: After River brings Simon the hodgeberries, the hair on her left shoulder constantly moves between shots.
Continuity mistake: In the opening scene where Simon is talking to his father about his dedicated source box, a newspaper on the table in front of his father keeps moving between shots.
Continuity mistake: As the crew leave Simon and River behind on Jiangyin, Simon's fringe changes between shots. In some there are 3 curled strands of hair, in others there are 2.
Continuity mistake: When Serenity disembarks from the Alliance ship after getting Shepherd Book stitched up, the lights on the port (left) and starboard (right) sides of the ship are reversed - the port lights are green when they should be red and the starboard lights are red when they should be green.
Chosen answer: One of the premises of the show is that the two major Earth societies that survived, and ultimately merged, were the Chinese and Americans. As a result the common language includes much Chinese. Clothing, signage, and building designs also have a heavy Chinese influence.