Launchpad currently recommends translating gnome-control-center in Ubuntu Bionic.

Template "gnome-control-center-2.0" in Ubuntu Bionic package "gnome-control-center"

Language Status Untranslated Need review Changed Last Edited By
Cherokee 100.00  100.0% untranslated 1578 1578 0 0
Dakota 100.00  100.0% untranslated 1578 1578 0 0
Hawaiian 100.00  100.0% untranslated 1578 1578 0 0
Inuktitut 100.00  100.0% untranslated 1578 1578 0 0
Lakota 100.00  100.0% untranslated 1578 1578 0 0
Ojibwe 100.00  100.0% untranslated 1578 1578 0 0
Spanish 000.51  99.4930291508% translated  0.506970849176% untranslated 8 8 0 236 236 2018-06-18 18:12:26 UTC 2018-06-18 Adolfo Jayme
Tlingit 100.00  100.0% untranslated 1578 1578 0 0
Yiddish 100.00  100.0% untranslated 1578 1578 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 gnome-control-center in Ubuntu