This addon is a locale. You need to extract it to your /locales folder to install it. For more help with locales check out the help topic here.
Translation of Vanilla to European Portuguese.
These files are the translation to European Portuguese pt_PT of the Vanilla installation using Baseline Locale by Todd Burry.
Instructions: Create a folder called 'pt_PT' in the '/locales/' folder and dump the files there. Then add the line "$Configuration['Garden']['Locale'] = 'pt_PT';" to config.php in the '/conf/' folder. Don't forget to activate the locale in the admin back-end of Vanilla.
These files should work fine for users though some of the admin is not translated. Some themes may override part of the translation too.
31/12/10 Warning: Outgoing emails do not display properly.
Changelog: v 1.0.2 Fixed the locale code. v 1.0.1 Added a few strings already in use in the Spanish and Dutch locale. v 1.0 Basic Baseline Locale release.