function local_pickup_extra_content_email($order, $is_admin_email) {
    if ( $is_admin_email ) {
        return;
    }

    if ( ICL_LANGUAGE_CODE == "he" && strpos( $order->get_shipping_method(), 'Local Pickup' ) !== false) {
        echo '<p><strong>Note:</strong> Please wait for telephone confirmation of local pickup.</p>';
    }
}

add_action( 'woocommerce_email_after_order_table', 'local_pickup_extra_content_email', 10, 2  );

add_action( 'woocommerce_email_after_order_table', 'local_pickup_extra_content_email', 10, 4  );
function local_pickup_extra_content_email( $order, $sent_to_admin, $plain_text, $email ) {
    // Only for "Processing Order" and "Order Completed" customer emails
    if( ! ( 'customer_processing_order' == $email->id || 'customer_completed_order' == $email->id ) ) return;

    if ( ICL_LANGUAGE_CODE == "he" && strpos( $order->get_shipping_method(), 'Local Pickup' ) !== false) {
        echo '<p><strong>Note:</strong> Please wait for telephone confirmation of local pickup.</p>';
    }
}