The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Pebble Technology Corp.:
Bienvenue, Willkommen, Bienvenido New: French, German and Spanish languages are automatically supported from the mobile app and appstore. New: set the language on your Pebble to supported languages (English, French, German, Spanish). Fixed: miscellaneous bugsAs always, update to have access to the latest version of apps and watchfaces in the Pebble appstore.