add_filter( 'notification/whitelabel/cpt/labels', function( $labels ) {
// These are the defaults.
'name' => __( 'Notifications', 'notification' ),
'singular_name' => __( 'Notification', 'notification' ),
'add_new' => _x( 'Add New Notification', 'notification', 'notification' ),
'add_new_item' => __( 'Add New Notification', 'notification' ),
'edit_item' => __( 'Edit Notification', 'notification' ),
'new_item' => __( 'New Notification', 'notification' ),
'view_item' => __( 'View Notification', 'notification' ),
'search_items' => __( 'Search Notifications', 'notification' ),
'not_found' => __( 'No Notifications found', 'notification' ),
'not_found_in_trash' => __( 'No Notifications found in Trash', 'notification' ),
'parent_item_colon' => __( 'Parent Notification:', 'notification' ),
'menu_name' => __( 'Notifications', 'notification' ),