Adia is fluent in both her native Leonisian and Caprican, the language of the colonies. Leonisian is functionally equivalent to French, and Caprican equivalent to English. HOWEVER, for the purposes of this LOL, I like the idea of her "English" sounding like Ancient Greek. She'll still be able to understand English, but good luck knowing what she's saying unless you've studied the classics. ;)

Caspar is fluent in all Colonial languages, as well as binary. :> He'll sound Greek, too, but he's quicker to pick up foreign languages.