There were two different versions of the film made... Version 1. The aliens mostly speak in an alien language, with subtitles. There is one alien that speaks English, but it is a lifeless dialogue, with an equally dull voice. Version 2. Same version as above, in terms of video. But the alien subtitles and dialogue have been completely removed, along with their dull voices. It has been re-dubbed with a silly Monty Python styled English dialogue, and just as silly voice actors. Who are extremely funny, the alternate audio transforming the movie completely.