I noticed that both #DepluralizeAFilm and #DepluraliseAFilm are trending. Is this an example of Americans arbitrarily spelling words differently than everyone else, or is one just wrong?

@JeremyMallin

It's just the difference betw. American English vs British.

So, both are correct - even though in the name of depluralisation we must choose only one.

(And so I did :-)