It seems numerous MediaWiki-extensions-OpenStackManager messages were never removed frrom twn
https://translatewiki.net/wiki/Special:PrefixIndex?prefix=Openstackmanager-&namespace=8
There's currently only 32 messages in en.json... and almost certainly more on the wiki
Current keys:
"openstackmanager-desc" "openstackmanager" "novakey" "specialpages-group-nova" "openstackmanager-novakey" "openstackmanager-delete" "openstackmanager-hiera-disabled" "openstackmanager-actions" "openstackmanager-notloggedin" "openstackmanager-mustbeloggedin" "openstackmanager-novapublickey" "openstackmanager-prefs-novapublickey" "openstackmanager-deletekey" "openstackmanager-deletekeyconfirm" "openstackmanager-keylist" "openstackmanager-addkey" "openstackmanager-name" "openstackmanager-fingerprint" "openstackmanager-keys" "openstackmanager-keypairimportfailed" "openstackmanager-keypairimported" "openstackmanager-keypairimportedfingerprint" "openstackmanager-keypairformatwrong" "openstackmanager-keypairformatconverted" "openstackmanager-deletedkey" "openstackmanager-deletedkeyfailed" "openstackmanager-shellaccountname" "openstackmanager-shellaccountname-pref" "openstackmanager-shellaccountnamehelp" "openstackmanager-shellaccountvalidationfail" "openstackmanager-shellaccountexists" "prefs-openstack" "prefs-openstack-keys"