I'm speaking of the statuses in the status column such as "New request", "Reverted","Queued request","Cancellation requested","Completed" and so on. In the staff loan requests table, these are translated via the include template "ill-list-table-strings.inc" but it seems there is no equivalent in the opac interface. I don't think this has been changed in master either.
This might in part be related to bug 32551. I am adding a see also.