Launchpad currently recommends translating gfxboot in Ubuntu Groovy.

Template "bootloader" in Ubuntu Groovy package "gfxboot"

Language Status Untranslated Need review Changed Last Edited By
Cherokee 100.00  100.0% untranslated 82 82 12 12 0 2018-10-02 08:33:01 UTC 2018-10-02
Dakota 100.00  100.0% untranslated 82 82 0 0
Hawaiian 100.00  100.0% untranslated 82 82 0 0 2018-10-02 08:33:01 UTC 2018-10-02
Inuktitut 080.49  19.512195122% translated  80.487804878% untranslated 66 66 0 0 2018-10-02 08:33:01 UTC 2018-10-02
Lakota 100.00  100.0% untranslated 82 82 0 0
Ojibwe 079.27  20.7317073171% translated  79.2682926829% untranslated 65 65 0 0 2018-10-02 08:33:01 UTC 2018-10-02
Spanish 000.00  100.0% translated 0 0 2 2 2018-10-02 09:11:16 UTC 2018-10-02 javier
Tlingit 100.00  100.0% untranslated 82 82 0 0
Yiddish 096.34  3.65853658537% translated  96.3414634146% untranslated 79 79 16 16 0 2018-10-02 08:33:01 UTC 2018-10-02
[ Change your preferred languages... View template & all languages... ]
Key to this table: “Unchanged” means Translated
and “untranslated” means just that, Untranslated

Other versions of gfxboot in Ubuntu