Shortly after the release of the Ultimate Collection, the landscape shifted. Blue Fang eventually closed its doors, and Microsoft moved on. The "official" French localization was messy. Many French players who bought the physical discs found that while the box was in French, certain expansions weren't fully translated, or worse, the installation instructions were a labyrinth of errors.
L'édition Ultimate Collection est massive. Elle regroupe le jeu de base ainsi que les quatre extensions majeures : (Animaux disparus) Marine Mania (Animaux marins) African Adventure (Aventure Africaine) Endangered Species (Espèces en danger) Zoo Tycoon 2 Ultimate Collection Patch Francais
There is no official "patch" released separately by Microsoft or Blue Fang Games to add French to the Ultimate Collection in English. The French language was included only in specific regional releases (e.g., French CD/DVD versions of Zoo Tycoon 2 and its expansions). Shortly after the release of the Ultimate Collection,
Si vous n’arrivez pas à faire fonctionner le patch automatique, sachez qu’il existe une méthode manuelle (pour les puristes) : Many French players who bought the physical discs