Glitchen was coined by Lelu in the Goodnight Groddle song. It refers to ALL Glitches everywhere throughout time/space/memory. Glitches is a plural but refers to a subset of Glitchen.
Glitcheroonies is a variation on the slang term "homies", "my dirty", "peeps", etc...
In most of the stuff written by Tiny Speck, I've seen it written as Glitches. I don't think I've ever seen it written as Glitchen, actually. *goes off to read the blog and website copy*
But then you also have to remember the lullaby on the GNG Musicblock was composed and sung by a player, like us. :) They do seem to use Glitches more often in official text. Shrugs?
I was so sure that there was something official somewhere stating where Glitch (noun, s), Glitches (noun, pl), Glitchen (noun, collective) and the adjectival Glitchen (adj) were used. I remember the, perhaps unhelpful, example of "We are Glitchen" being used somewhere? It's not on the About page but I'm so sure it was somewhere......
Am I hallucinating? Did anyone else remember reading that?