When Brooke and Julian go sky diving they jump out of the plane solo. Having never sky dived before they would have had to perform tandem jumps, which is being strapped to trained sky divers.
(at around 30 mins) Brooke walks in to her home to find a package from Julian with a note that reads "Mettez cela sur (put this on)", which Brooke proceeds to diligently read aloud as such. The French translation of "put this on" is however completely incorrect. Several translations would have been possible, including "met ceci" or "enfile ceci", though a more proper form would have been "met ces habits" or "enfile ces vêtements" (put these clothes on). You would think that Julian would have checked on what he was writing, what with him trying to teach the language to Brooke.