Issac Asimov wrote the English translation for the English version of the film.
The film is based on the novel "Les Hommes-machines contre Gandahar" (The Machine-Men versus Gandahar) by Jean-Pierre Andrevon.
The English release title of Gandahar is Light Years. A translation of the French tagline found on posters for the film's release.
The English version was directed by Harvey Weinstein and produced by Bob Weinstein.
The English release changed the original orchestral soundtrack to a progressive style rock, in an attempt to better fit the American audience.