Earlier quoted context omitted.
Honest question, what's the meaning behind this joke? Is it just referencing the fact that American English drops "u" in the spelling of e.g. "color"?
It's primarily a reference to various language selection dropdowns offering "Chinese (Traditional)" (which is used in Taiwan) and "Chinese (Simplified)" (which is used on the Chinese mainland). That difference arises from Mao-era simplification of many of the most common hanzi characters to make them easier to write or distinguish. Mixed with, yes, the variant spellings and word choices (e.g. chips/crisps/biscuits) t…
EDIT: Of course, it doesn’t matter one bit in the grand scheme of things—feel free to ignore my pedantry over a silly joke :-)