[smeagull]

Actually we're speaking English, and not Greek or Latin, so we add an 's' or 'es'.

Just because some English professor assholes wanted to show off their knowledge of foreign languages in the 17-19th centuries, doesn't mean we should follow those rules now. They are responsible for a lot of the confusion and horrible English rules that users of English now have to deal with. I say shit on their horrible legacy.