Launchpad currently recommends translating webkit2gtk in Ubuntu Cosmic.

Template "webkit2gtk-4.0" in Ubuntu Cosmic package "webkit2gtk"

Language Status Untranslated Need review Changed Last Edited By
Cherokee 100.00  100.0% untranslated 568 568 0 0
Dakota 100.00  100.0% untranslated 568 568 0 0
Hawaiian 100.00  100.0% untranslated 568 568 0 0
Inuktitut 100.00  100.0% untranslated 568 568 0 0
Lakota 100.00  100.0% untranslated 568 568 0 0
Ojibwe 100.00  100.0% untranslated 568 568 0 0
Spanish 020.07  79.9295774648% translated  20.0704225352% untranslated 114 114 10 10 0 2018-05-25 08:33:20 UTC 2018-05-25 Daniel Mustieles
Tlingit 100.00  100.0% untranslated 568 568 0 0
Yiddish 100.00  100.0% untranslated 568 568 0 0
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Key to this table: “Unchanged” means Translated
and “untranslated” means just that, Untranslated

Other versions of webkit2gtk in Ubuntu