One of the things I like most about Moore's writing is his fondness of playing with language. As early as his 1984 Swamp Thing story "Pog," an SF tribute to Pogo, he took the original characters' funny backwater talk and transformed it into a beautiful dialect almost entirely made up of portmanteau words (e.g. Captain "Pog" calls Swamp Thing the planet's "guardiner"). Two years later, for a story where Swampy meets Adam Strange on the planet Rann, Moore created a full-fledged Rannian language (and yes, much of it is understandable from the context).
I know there are at least a few other examples but I'm too tired at the moment to remember them...