I object based on the British/American language debate.
Why did people tag sidewalk=* ? Maybe they meant something different to the established tag of footway=*.
Change footway in America if you have to, but don’t go changing it in the UK or other countries. What’s the point of having a preferred language for tags if we go against it because some Americans can’t deal with another language. Many other non-British countries cope or use an editor with translations.