Additional labels for custom post types and custom taxonomies

In WordPress 4.3 and 4.4, additional labels have been made available for custom post types and custom taxonomies. These get passed in via the labels argument when using register_post_type() and register_taxonomy().

New post type labels in 4.3:

• featured_image – Overrides the “Featured Image” phrase for this post type. See #19257.
• set_featured_image – Overrides the “Set featured image” phrase for this post type. See #19257.
• remove_featured_image – Overrides the “Remove featured image” phrase for this post type. See #19257.
• use_featured_image – Overrides the “Use as featured image” phrase for this post type. See #19257.

New post type labels in 4.4:

• archives – The post type archive label used in nav menus. Default “Post Archives”. See #16075.
• insert_into_item – Overrides the “Insert into post”/”Insert into page” phrase (used when inserting media into a post). See #33616.
• uploaded_to_this_item – Overrides the “Uploaded to this post”/”Uploaded to this page” phrase (used when viewing media attached to a post). See #33616.
• filter_items_list – Screen reader text for the filter links heading on the post type listing screen. Default “Filter posts list”/”Filter pages list”. See #32147.
• items_list_navigation – Screen reader text for the pagination heading on the post type listing screen. Default “Posts list navigation”/”Pages list navigation”. See #32147.
• items_list – Screen reader text for the items list heading on the post type listing screen. Default “Posts list”/”Pages list”. See #32147.

New taxonomy labels in 4.3:

• no_terms – Used when indicating that there are no terms in the given taxonomy associated with an object. Default “No tags”/”No categories”. See #32150.

New taxonomy labels in 4.4:

• items_list_navigation – Screen reader text for the pagination heading on the term listing screen. Default “Tags list navigation”/”Categories list navigation”. See #32147.
• items_list – Screen reader text for the items list heading on the term listing screen. Default “Tags list”/”Categories list”. See #32147.

See the documentation for get_post_type_labels() and get_taxonomy_labels() for the full list of available labels.

Additional labels for custom post types and custom taxonomies by John Blackbourn was originally posted at https://make.wordpress.org/core/2015/12/11/additional-labels-for-custom-post-types-and-custom-taxonomies/