Shot simultaneously in French and English. For the French version, the French actors spoke in French, the rest recited their dialogues in English and were later dubbed by other actors. For the English version, the French actors repeated the same shots reciting the dialogues in English.
There is a two-episode miniserie (approx. 90 mins each) that aired in English language (not-dubbed) on A&E. There is also an extended DVD version, which I do not have the detail for (also from A&E).