wc-emails-classic

To add a custom WooCommerce email, extend the WC_Email class, configure template paths, register it via the woocommerce_email_classes filter, and bind it to a woocommerce_order_status_*_notification action.

To override WooCommerce email templates in your theme, place copied template files under woocommerce/emails in your theme directory. This ensures theme-level customization for your transactional emails while maintaining safe fallbacks to default plugin templates.

Trigger custom WooCommerce emails on order status changes by binding your WC_Email subclass to woocommerce_order_status_<from>_to_<to>_notification actions. This ensures your custom notification dispatches correctly during specific order status transitions.

No, this WooCommerce email customization approach does not use the block editor. It specifically targets the classic PHP-template path, allowing developers to tune subject and heading strings via admin settings and subclass WC_Email directly.

Manage locale consistency for custom WooCommerce transactional emails by utilizing admin-configurable strings within your WC_Email subclass. This approach supports multilingual sites and ensures business-specific messaging across different locales.

The best way to adjust subject and heading strings for WooCommerce emails is through admin settings configured within your extended WC_Email class. This allows business-specific messaging and locale consistency without modifying core plugin files.