Remember, most LDS branch libraries in your area can rent any microfilm on file in Salt Lake. The signatures and listings apply to US Church records too, but it depends on what was filmed. Don't get transcribed records of register marriages that can leave out data. Get the actual Church register page copied. Be nice, but firm about the copying.
Clerks can make errors in 'official' marriage certificates.
The French words are in the English word order you speak. Just translate word for word. Since April 1998, the normal counter hit rate is 2-3 hits per day.