I see, I think, for the english speakers, creative editing, and for the aliens, a legitimate case can be made for subtitling, giving room to breath and shape the story.

Edit: From what I have gathered, the alien languages are sort of a munging and backmasking of foreign languages? I wonder: Game Audio has got a large influx of people looking for projects on which to score credit. Perhaps putting some feelers into the game development community might find some people who would be enthusiastic about inventing some languages and with the technical wherewithall to record and produce it properly?