lets change:
+  'manage-wikia-home-modal-content-add-blocked-wiki-warning' => 'You cannot add blocked wiki to collection',
to
+  'manage-wikia-home-modal-content-add-blocked-wiki-warning' => 'You cannot add blocked wikis to a collection',

@lgarczewski - I believe this is the terminology given from the Product Owner, I see where it might cause confusion, but this is a back end tool used by staff who typically don't work with user right and statuses. I will talk to the PO