American or British spelling for the Handbook?

I recently noticed that some of the 2.0 Handbook pages I wrote have been corrected. Many typos, formatting rudeness and similar have been fixed, which is great!

Thanks in particular to Jojo-Schmitz, who painstakingly scrutinized my clumsy prose.

I also noticed that some terms have been changed from British to American orthography (for instance "dialogue" => "dialog" and, perhaps, "centre" => "center"); is this intentional? Is American spelling 'officially' adopted for the MuseScore Handbook?

Thanks,

M.