I grew up in a polyglot family, but I don't think it was a typical one -- my dad is from Ireland, and my mom is second-generation Irish-American, and they've studied more dead languages (Classical Greek, Latin, Old Irish, Old Norse) and nearly-dead languages (Irish) between them than living ones. I can't actually do a convincing Philadelphia accent (other than obvious things like "wooder" for "water," "cwurdder" for "quarter") even when I'm trying to, so we'd probably have to find a better native speaker for popupphilly.com.