>>Surely you mean "honored" is an American CORRUPTION of "honoured"? You've got to ask yourself which spelling came first.
>>
>>Same goes for succour, colour, Marlborough, axe, at al.
>
>Yes, I've ran it through my Outlook spellchecker and it replaced it with honored. So, I guess here we're using simplified version of this word and lots of others, and I already got used to this spelling. What is succour, BTW?

Succour is another word for help (esp. coming to someone's rescue). It's from the Old French same root as the modern French "secours" - "sucors", from the Latin.

But, no, you'd obviously use the accepted American spellings for everything, otherwise people would assume the programmer can't spell.

Incidentally, in English English a TV program, or program of events, is spelt "programme" but for a computer we use the American spelling. Still there are English who incorrectly refer to "comnputer programmes".
ps You've run it through the spellchecker.