I have very philosophical language-related questions about the comics:
If they're not living on Earth, how come they're speaking English? How are they using the Roman alphabet? Did the echidnae have their own language in ancient times? How did the word "Mobius" come up?
Put your creative or interesting comments below.
EDIT: I forgot that Mobius is what Earth is called in the future. Here's my theory: They were speaking English and using the Roman alphabet during the time of the Xorda bombings. The Mobians had printing presses to perserve their language (without a constantly-used written form, a language changes radically), and the Overlanders had computers, typewriters, etc. French, Spanish, and other languages also existed.