To reproduce:
- Open https://www.wikidata.org/wiki/Special:NewLexeme
- Enter Q1 as the item for the language (to cause the "Spelling variant of the Lemma" field to appear)
- Open the spelling variant field and scroll to the bottom
Expected result: It lists "Guernésiais (nrf-gg)" and "Jèrriais (nrf-je)"
Actual result: It lists "⧼wikibase-lexeme-language-name-nrf-gg⧽ (nrf-gg)" and "⧼wikibase-lexeme-language-name-nrf-je⧽ (nrf-je)"
As far I can tell, those two keys need adding to https://gerrit.wikimedia.org/g/mediawiki/extensions/WikibaseLexeme/+/HEAD/i18n/en.json#97