Launchpad currently recommends translating nautilus in Ubuntu Cosmic.

Template "nautilus" in Ubuntu Cosmic package "nautilus"

Language Status Untranslated Need review Changed Last Edited By
Cherokee 100.00  100.0% untranslated 1116 1116 0 0
Dakota 100.00  100.0% untranslated 1116 1116 0 0
Hawaiian 100.00  100.0% untranslated 1116 1116 0 0
Inuktitut 100.00  100.0% untranslated 1116 1116 0 0
Lakota 100.00  100.0% untranslated 1116 1116 0 0
Ojibwe 100.00  100.0% untranslated 1116 1116 0 0
Spanish 000.00  100.0% translated 0 0 127 127 2018-10-15 15:27:05 UTC 2018-10-15 Daniel Mustieles
Tlingit 100.00  100.0% untranslated 1116 1116 0 0
Yiddish 098.57  1.43369175627% translated  98.5663082437% untranslated 1100 1100 0 0 2018-10-15 15:43:18 UTC 2018-10-15 Raphael Finkel
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Key to this table: “Unchanged” means Translated
and “untranslated” means just that, Untranslated

Other versions of nautilus in Ubuntu