Approval.

backend/fr/exhibitions.json

@@ -43,6 +43,7 @@
         "permanent_exhibition": "Permanent exhibition",
         "toggled_highlighting": "Toggled highlight status",
         "highlight": "Highlight",
-        "deleted_poster": "Deleted exhibition image"
+        "deleted_poster": "Deleted exhibition image",
+        "exhibition_poster": "Poster of the exhibition"
     }
 }