English vs. American vs. Canadian spelling

I was raised and educated in Canada. When it came to spelling and grammar, sometimes we did it the English way and sometimes we did it the American way. In fact, the word "spell" is a perfect example of this conundrum. My Oxford Dictionary assures me that "spelt" is the past tense of "spell" as does my copy of "Advanced Grammar in Use". To further complicate the matter, my Canadian grammar books do not list "spell" as an irregular verb. Thus, I should spell the past tense of spell, spelled.

Readers of this blog should be aware that at the University of Leicester, we use English spelling throughout our work. Thus, you should be aware of these differences:

Can-American/English
tire/tyre
traveled/travelled
colour/color/colour
aluminum/aluminium
cancelled/canceled/cancelled
judgment/judgement
civilization civilisation/civilization
mold/mould
licorice/liquorice
dreamed dreamt
cheque/check cheque
connection/connexion
favorite/favourite

jewelry/jewellery
archeology/archaelogy
program/programme
fetus/foetus
realize/realise

These, of course, are not the only examples. Use your Oxford/English Dictionary for more examples.

KB