The Message - S1-E15
Other mistake: The characters in this show often use the made-up curse words 'gorramn' and 'gorrammit.' Toward the end of this episode, just as Tracey grabs Kaylee as a hostage, he shouts, "Gorrammit, Mal." The subtitles read: "You're a rabbit, Mal." (00:35:50)
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.