Launchpad currently recommends translating libvirt in Ubuntu Cosmic.

Template "libvirt" in Ubuntu Cosmic package "libvirt"

Language Status Untranslated Need review Changed Last Edited By
Cherokee 100.00  100.0% untranslated 9817 9817 0 0
Dakota 100.00  100.0% untranslated 9817 9817 0 0
Hawaiian 100.00  100.0% untranslated 9817 9817 0 0
Inuktitut 100.00  100.0% untranslated 9817 9817 0 0
Lakota 100.00  100.0% untranslated 9817 9817 0 0
Ojibwe 100.00  100.0% untranslated 9817 9817 0 0
Spanish 040.48  59.5192013854% translated  40.4807986146% untranslated 3974 3974 1 1 1141 1141 2018-09-04 23:18:27 UTC 2018-09-04 Javier Blanco
Tlingit 100.00  100.0% untranslated 9817 9817 0 0
Yiddish 100.00  100.0% untranslated 9817 9817 0 0
[ Change your preferred languages... View template & all languages... ]
Key to this table: “Unchanged” means Translated
and “untranslated” means just that, Untranslated

Other versions of libvirt in Ubuntu