Continued from here:
Some US spellings actually go back to their original sources. e.g. "color" is spelt without a 'u' because that's exactly how it's spelt in its original Latin. Standard English spells it with a 'u' because the word arrived in English via French. They refer to autumn as "fall" because that is the original English word for that season. "Autumn" is actually Latin via French. The funny thing about Standard English is that "autumn" is the only Latin-based season name that we use - Spring, Summer and Winter are all original English words. If we were to use Latin then they'd be Autumn, Vern, Estiv and Hibern. Which is why the mid-season solstices are called autumnal, vernal, estival and hibernal respectively. The Americans made things more consistent by restoring "autumn" back to its original Anglo form, "Fall."
Americans also unclipped vowels that English speakers had come to clip.
e.g.
Library = we say "lye-bree", Yanks say "lye-breh-ree"
Although American English has also re-clipped itself in other parts, such as:
Interesting = we say "in-chress-ting," Yanks say, "inner-ress-ting"
Internet = we say "in-ter-net," Yanks say, "inner-net."
Other interesting examples beyond English include:
* European vs Canadian French
* Dutch vs Afrikaans
...etc
