Launchpad currently recommends translating network-manager in Ubuntu RTM 15.04.

Template "networkmanager" in Ubuntu RTM 15.04 package "network-manager"

Language Status Untranslated Need review Changed Last Edited By
Cherokee 100.00  100.0% untranslated 1660 1660 0 0
Dakota 100.00  100.0% untranslated 1660 1660 0 0
Hawaiian 100.00  100.0% untranslated 1660 1660 0 0
Inuktitut 100.00  100.0% untranslated 1660 1660 0 0
Lakota 100.00  100.0% untranslated 1660 1660 0 0
Ojibwe 100.00  100.0% untranslated 1660 1660 0 0
Pennsylvania German 100.00  100.0% untranslated 1660 1660 0 0
Spanish 005.48  94.51807228915663% translated  5.481927710843373% untranslated 91 91 63 63 581 581 2018-06-18 16:05:04 UTC Rodrigo Lledó
Tlingit 100.00  100.0% untranslated 1660 1660 0 0
Yiddish 100.00  100.0% untranslated 1660 1660 0 0
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Key to this table: “Unchanged” means Translated
and “untranslated” means just that, Untranslated

Other versions of network-manager in Ubuntu RTM