@Mike_Unwalla, However, I found some references that can be helpful. Though I did not test the US version in LT so I cannot provide the exact list, but the references that I’m going to mention may be of some use.
http://www.tysto.com/uk-us-spelling-list.html
https://en.oxforddictionaries.com/spelling/british-and-spelling
https://en.wikipedia.org/wiki/Wikipedia:List_of_spelling_variants
https://en.wikipedia.org/wiki/American_and_British_English_spelling_differences
Hope this helps. Thank You.