This is only barely related, but I read something a few weeks ago that I think those interested in this topic would also find interesting: A few years ago, researchers discovered that schoolchildren in Baltimore had invented a new gender-neutral singular pronoun : http://grammar.quickanddirtytips.com/grammar-yo-pronoun.aspx
An interesting article, thank you. "Yo" seems to feel more natural than the usual Spivak options. I was mildly amused at the "pause/unpause" word pair mentioned in the article, I had always assumed that the pair was "pause/resume"...
It's analogous to "mute/unmute" and "mute/resume[sound]" where the unmute is by pressing the "mute" button, ie releaseing the mute state, whilst the resumption of sound can be achieved by pressing a volume up or down button.