User blog comment:Exodvs/Languages/@comment-1669199-20120623132859

If you're referring to the main setting in the Archie Comics (being Mobius Prime), then yes, the planet technically is earth but was renamed when most of humanity was wiped out by the Xorda over 12,000 years ago when the Xorda bombarded the Earth's surface with their gene bombs. However, some humans and animals survived and, as a result of the side-effects caused by the gene bombs, caused mutations for both the humans and the animals that were still on the surface of the planet when the gene bombs hit: The humans that survived the gene bombs devolved into a more aggressive species known as "Overlanders", and the animals became anthromorphic and more intelligent as a result of their own mutations from the gene bombs, thus creating the anthromorphic animals known as "Mobians". However, it should be noted that at least one group of original humans had survived and built the underground city of Station Square over the years while new civilizations began to arise on the surface of the Earth, while it would seem some animals kept their original forms as well.

Anyway, on to the main topic. My theory is that the anthromorphic species on the surface of Mobius developed their own language that, coincidentally (although I'd personally consider the possibility that "devine" intervention might've had something to do with how the language seen in the comic's modern and future timelines), shares a shocking amount of similarities to the English language that humans had used for communication in some countries 12, 000 years ago, while the surviving group of humans that built Station Square could be assumed to have been from a country that spoke English and has therefore kept the language for thousands of years as their own civilization grew. The use of the Roman alphabet could've possibly come from the extinct human civilizations when Overlander/Mobians discovered potential relics from those ancient times and has therefore possibly incorperated some elements from those old cultures into their own. As for the echidna having their own language in ancient times, I personally doubt it but I can't say for sure. Most of what I'm typing are just theories, anyway. The most logical and realistic thing to assume is that the comics were made so the readers could understand whatever languages the characters spoke (unless the plot demands otherwise, although this is usually temporarily) and had incorperated elements from our own cultures into the cultures seen in the comics so they could serve as references to our own past civilizations while lacking any real purpose.