Character’s Speak a Mix of English, Mandarin and Cantonese
If you find yourself watching Firefly one day and start to think your television’s language setting changed, don’t worry, your TV is just fine. The show’s creators got creative when it came to dialogue within the universe’ and made English, Mandarin and Cantonese the three leading dialects. The reasoning for the odd combination is that both the United States and China were widely responsible for the departure from Earth, providing the needed technology and man power to make it possible. The mass exodus of combined cultures over generations fused the two together, creating a universe where both languages are more prodominent. Any cursing done on-screen was done so in Mandarin, likely as a means of getting around American sensors.