Convert a pre-typed US English document to a UK English document

Thanks Doug_Robbins_Word_MVP 

The AutoSpellCorrect macro provided by the forum contributor is 90%ish what I'm after (the only niggle being that it functions a bit too generally in not deciding to change the spelling of words based solely on whether the US English words it's correcting have a UK English counterpart -- the macro is, therefore, going to be prone to making contextual spelling errors, as pointed out in the forum postings).  But, even so, there's no need to worry too much about that in this instance because I'm going to have to read through the entire document after the macro's run anyway, and the document's not too long.  (There are, though, going to be quite a few of these documents that will need converting to UK spelling.)

But all Word has to do to get 100% of what I'm after is confine any spelling changes it makes solely to  those US English words that it recognises are spelled differently from the equivalent UK English words (and vice versa, to convert a document from UK English to US English).  It already has separate language packs it can access for US English and UK English, so it should be well within the realms of coding possibility to make such functionality 100% reliable (or as near as dammit).  E.g. Does the US English word "color" have a UK  English equivalent word that is spelled differently?  If yes, then change its spelling to UK English.  If no, then make no changes, move on to the next word and ask the same question.  That's the entire coding in a nutshell.  Word already can translate French Canadian to standard French, and vice versa, so I know it already has the capability, it's just the devs for some  perplexing reason haven't thought to do the same for US/UK English.

Thanks again, though -- big help!