core/Intl/Data/Resources/continents.php

<?php

/**
 * Matomo - free/libre analytics platform
 *
 * @link    https://matomo.org
 * @license https://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 */

/**
 * Continent database.
 *
 * Primary reference: ISO 3166-1 alpha-2
 */
return array(
    'unk', // unknown
    'amn', // North America
    'amc', // Central America
    'ams', // South America
    'eur', // Europe
    'afr', // Africa
    'asi', // Asia
    'oce', // Oceania
    'ant', // Antarctica
);