Voice tracks? I'm sure it would have just been text to speech translation (which has been around since at least the early 80s). As far as the different languages it's just a matter of switching the language over and tweaking the program to say things proper (which would still have cost money and time) but nothing too far fetched I would think. The memory is the biggest issue I really see with the system.
It would probably had only been installed on the JDM version anyways.... and the rest would have just what they have now. I can't really give an educated or fair guess on how much it would have cost for the navigation unit but I seriously don't think it would have increased the price above $4k extra. (which of course would have probably been a coffin move for Subaru... unless they just made it an option across the board). I wouldn't think a computer system is needed to attract people to the car.... with windows like that
