Unlike many of the previous Arthurian films that drew to greater or lesser extent from Sir Thomas Malory's (1415-1471) "Le Morte d'Arthur," this film clearly drew from the romances written by French poet Chrétien de Troyes (1130-1191), who actually invented the character of Lancelot.
During the final sword fight both Lancelot and Malagant's blades were replaced with CGI to ensure safety and allow the actors to swing them faster. When the film arrived on VHS home video the Full Frame Pan Scan version of the film showed frames of the film that would be normally cut off by the letterbox aspect ratio. The frames revealed Lancelot standing with just the hilt of a sword.
Malagant is not a renamed version of the Arthurian character Mordred but a separate character who first appears in "Lancelot, the Knight of the Cart" by Chrétien de Troyes written sometime between 1175 and 1181.
Mark Ryan who played Lancelot's first opponent in the movie was also the film's assistant sword master.