Launchpad currently recommends translating gcc-8 in Ubuntu Disco.

Template "gcc" in Ubuntu Disco package "gcc-8"

Language Status Untranslated Need review Changed Last Edited By
Cherokee 100.00  100.0% untranslated 12898 12898 0 0
Dakota 100.00  100.0% untranslated 12898 12898 0 0
Hawaiian 100.00  100.0% untranslated 12898 12898 0 0
Inuktitut 100.00  100.0% untranslated 12898 12898 0 0
Lakota 100.00  100.0% untranslated 12898 12898 0 0
Ojibwe 100.00  100.0% untranslated 12898 12898 0 0
Spanish 021.85  78.1516514188% translated  21.8483485812% untranslated 2818 2818 0 0 2019-04-06 21:56:07 UTC 2019-04-06 Antonio Ceballos Roa
Tlingit 100.00  100.0% untranslated 12898 12898 0 0
Yiddish 100.00  100.0% untranslated 12898 12898 0 0
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Template "cpplib" in Ubuntu Disco package "gcc-8"

Language Status Untranslated Need review Changed Last Edited By
Cherokee 100.00  100.0% untranslated 216 216 0 0
Dakota 100.00  100.0% untranslated 216 216 0 0
Hawaiian 100.00  100.0% untranslated 216 216 0 0
Inuktitut 100.00  100.0% untranslated 216 216 0 0
Lakota 100.00  100.0% untranslated 216 216 0 0
Ojibwe 100.00  100.0% untranslated 216 216 0 0
Spanish 000.00  100.0% translated 0 3 3 0 2019-04-09 08:25:32 UTC 2019-04-09 Fco. Javier Serrador
Tlingit 100.00  100.0% untranslated 216 216 0 0
Yiddish 100.00  100.0% untranslated 216 216 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 gcc-8 in Ubuntu