Are we using American or British English for tag wikis?

Question

As a Brit my natural tendency is obviously to go with British English but I was just editing the Webform tag excerpt and I was torn between using "personalised", or "personalized". The latter is already included in the main tag wiki so I didn't know whether to change both to British, change both to American, or leave the one that's already there alone and updated just the excerpt to use British English.

I know it's of very little importance but are there any official Stack Exchange guidelines on this?

Answer 1

I didn't find any official reference on Meta Stack Overflow, but in this answer to What's the deal with retagging from UK English to US English, Marc Gravell says:

A related issue is "correcting" the language in the title/body. In the case of the question in hand, the UK term seems entirely correct. In general, I have to concede (and I'm UK) that the US mis-spellings have become the standard. Much like the accidental referer/referrer. We're stuck with color etc, and too many "z"s to be helpful, but such is life ;-p

There are other differences between American and British English, such as the usage of punctuation in quotes.

I would say that it is preferable being constant in the used spelling, and as for the what noted from Marc Gravell, I would choose the American English spelling.