Approval.

backend/tl/collection.json

@@ -55,6 +55,8 @@
         "main_image": "Main image",
         "add_alternative_language": "All alternative language entry for this collection",
         "no_superordinate_collection": "No superordinate collection has been assigned",
-        "no_subordinate_collection": "No subordinate collection has been assigned"
+        "no_subordinate_collection": "No subordinate collection has been assigned",
+        "hide_collection": "Collection is public. Hide it",
+        "publish_collection": "Collection is hidden. Publish."
     }
 }