Sir and lord both sound like good alternatives, once I have a voice picked out, I can start working on the dialogue itself, beyond these initial plans. I'm looking at finding an arrangement of the opening theme that goes for 2 minutes, as my crawl is longer than the original. I've also worked in the Imperial March at various places, first in scenes with the droid invasion, and then again in several scenes with Anakin.
I've found a way to record the Neimodian lines, the alien language is in the vain of this:
Nupwaw, guz ajuk nij, huv pes bur adimjif, mukfostiv buhihweh kejcudkeh nip.
(Of course, as you know our blockade is legal, we'd be happy to have the ambassadors.)