woocommerce_get_country_locale_default filter-hookWC 1.0

Usage

add_filter( 'woocommerce_get_country_locale_default', 'wp_kama_woocommerce_get_country_locale_default_filter' );

/**
 * Function for `woocommerce_get_country_locale_default` filter-hook.
 * 
 * @param  $default_address_fields 
 *
 * @return 
 */
function wp_kama_woocommerce_get_country_locale_default_filter( $default_address_fields ){

	// filter...
	return $default_address_fields;
}
$default_address_fields
-

Where the hook is called

WC_Countries::get_country_locale()
woocommerce_get_country_locale_default
woocommerce/includes/class-wc-countries.php 1653
$this->locale['default'] = apply_filters( 'woocommerce_get_country_locale_default', $this->get_default_address_fields() );

Where the hook is used in WooCommerce

woocommerce/src/Blocks/Domain/Services/CheckoutFields.php 236
add_filter( 'woocommerce_get_country_locale_default', array( $this, 'update_default_locale_with_fields' ) );