In the states, we could consider "finalisation" spelled incorrectly and "finalization" spelled correctly. I guess it's one of those evolving changes that Tezcatlipoca was talking about. The same would be said about the UK's use of "our" at the end as opposed to "or" that the US uses. ie UK: colour US: color.
Since you add the "u" in there, or we took it away, how do you say and spell "flour"? Does it sound more like "floor" there, or is it just one of those strange "occurances" in the English language?