Thats becuase your looking at reviews for the uk import or some other release outside the US. The GKIDS version has english and japanese audio with subtitles for both language options.
In honor of Satoshi Kon's birthday today, you might also want to look into pairing Tokyo Godfathers and Millennium Actress with another BluRay (sadly Perfect Blue is not in this deal). They will turn out to be about $13 each.