As far as I know, in the English speaking world, nothing has ever generally replaced vernal and autumnal. March and September, Northward and Southward have been used but, again, not supplanted the Latin terms. The oddest and most enduring alternative is the "first point of Aries" and "first point of Libra" which is still used in navigation I understand. 

On Tue, Feb 25, 2014 at 8:24 AM, Patricia Galbraith <[log in to unmask]> wrote:
You must have been up VERY late, Alban.  Looking back on some of the stuff that's crossed the CalonList, and you consider THIS weird?  Emoji
> Date: Tue, 25 Feb 2014 00:03:08 -0600
> From: [log in to unmask]
> Subject: [CALONTIR] astronomical (sort of) term?
> To: [log in to unmask]

> The Vernal Equinox takes place every Spring when the Sun crosses the
> apparent Equator, making the day and the night equal. Ditto for the
> Autumnal Equinox, six months earlier/later (depending on how you look
> at it).
> Once Europeans had started going south of the Equator for long enough
> that they knew the seasons were reversed, did they come up with a more
> generic term for the equinoxes that didn't involve the words "vernal"
> or "autumnal" to refer to a specific equinox? Was there a general term
> for "The thing that happens in March that's not tied to a particuolar
> season"?
> .....and how long did it take them to realize that the seasons were
> reversed, anyway?
> Alban, staying up way too late to write messages that are way too weird.