You mention Bluffe first so I assigned you that one. I don't selectively cast folks for specific parts nor tell them what to sound like when they record their character: my stock reply for that hands-off approach is:
Thanks, ToddI very honestly leave choice of accents and characterizations in ANY part up to the reader. One of the key pleasures of running a play here at Librivox is finding out what the various readers have decided is right. Usually some unexpected things, and always different than I had originally pictured the play on stage myself. So that the completed play is not my vision of what should be, but a truly new and exciting collaborative creation.