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<?php
/**
* Shared locale helper for extensions that load assets from widgets.wp.com.
*
* Used by CDN-based loaders (Image Studio, AI Sidebar) that need to map the
* current user's WordPress locale to the ISO 639 language code used by the
* widgets.wp.com translation files at languages/{code}-v1.js.
*
* @package automattic/jetpack
*/
namespace Automattic\Jetpack\Extensions\Shared;
if ( ! defined( 'ABSPATH' ) ) {
exit( 0 );
}
/**
* Determine the ISO 639 locale code for the current user.
*
* Normalizes the WordPress user locale to match widgets.wp.com translation
* file naming. Preserves region for a small set of locales where the region
* is meaningful (pt_br, zh_tw, zh_cn); strips the region for all others;
* falls back to 'en' when the locale is empty.
*
* @return string The ISO 639 language code, defaulting to 'en'.
*/
function determine_iso_639_locale(): string {
$language = get_user_locale();
$language = strtolower( $language );
if ( in_array( $language, array( 'pt_br', 'pt-br', 'zh_tw', 'zh-tw', 'zh_cn', 'zh-cn' ), true ) ) {
$language = str_replace( '_', '-', $language );
} else {
$language = preg_replace( '/([-_].*)$/i', '', $language );
}
if ( empty( $language ) ) {
return 'en';
}
return $language;
}