Complex sentence: The dialogue of Andie MacDowell, who played Jane, was dubbed in post-production by Glenn Close because of her southern accent, apparently deemed unsuitable for the character, though not to provide an English accent for her character as some have held.
Split into simpler sentences: The dialogue of Andie MacDowell, who played Jane, was dubbed in post-production by Glenn Close. This was due to MacDowell's southern accent, apparently deemed unsuitable for the character, but was not done to provide an English accent for her character as some have held.