I will look into adding the following language codes to the list of language codes available for monolingual text values:

• fkv (Kvensk) T74590
• rom (Romani) T74590
• rmg (Scandoromani) T74590
• Akkalasamisk (sia) - dead language
• Kildinsamisk (sjd) - 800 users
• Kemisamisk (sjk) - dead language
• Tersamisk (sjt) - 6 users
• Enaresamisk (smn) - 250 users
• Skoltesamisk (sms) - 400 users
• Umesamisk (sju) - 10 users
• Pitesamisk (sje) - 20 users
• Lulesamisk (smj) - 2000 users
• Talossan (tzl) T98314 https://meta.wikimedia.org/wiki/Requests_for_new_languages/Wikidata_Talossan
• Cape Verdean Creole (kea) (link)
• Finnish Swedish (sv-fi) (link)
• Korean (Hanja) (ko-kore?) (link)
• Koyukon (koy) (link)
• Lakota (lkt) (link)
• Old High German (goh) (link)
• lld (Ladin language, Q36202, spoken by some 30.000 people on the Dolomiti mountains in Italy)
• ett (Etruscian)

Initial support will probably be really bare-bones. That means that the language code might not have a pretty name and will not be available from the language code suggester. You will be able to save and retrieve it, though.

I'll also T125064: [Task] Define and document process for requesting language codes for monolingual text values, so that this will become much easier for you in the future.

I won't do sr-cyrl now, but as part of T125073.

Not now:

• kea is about terms, not monolingual text

Waiting for responses:

• Asked on T74590 for statements on the languages from Norway so that I can check usage
• Asked on T98314 for statements on tzl
• Asked for statements on sv-fi
• Will talk to @Nikki about ko-kore. kore is already the default script for ko, so we shouldn't add it. We could add ko-hang and ko-hani (although hani is generic Han, not Hanja).
• Asked for statements on koy

Good to go:

• lkt

Still have to look at:

• goh (user left Wikidata and request was unspecific)
• lld
• ett

• Won't do goh now
• Asked for statements on lld
• Asked for statements on ett

Change 273192 had a related patch set uploaded (by Adrian Heine):
[WIP] Add language codes to mono ContentLanguages

https://gerrit.wikimedia.org/r/273192

In T125066#2059207, @adrianheine wrote:

Waiting for responses:

• Asked on T74590 for statements on the languages from Norway so that I can check usage
• Asked on T98314 for statements on tzl
• Asked for statements on sv-fi
• Will talk to @Nikki about ko-kore. kore is already the default script for ko, so we shouldn't add it. We could add ko-hang and ko-hani (although hani is generic Han, not Hanja).

These are still open.

Change 273192 merged by jenkins-bot:
Add language codes to mono ContentLanguages

https://gerrit.wikimedia.org/r/273192

Change 281895 had a related patch set uploaded (by Adrian Heine):
Add more codes to monolingual text languages

https://gerrit.wikimedia.org/r/281895

Change 281895 merged by jenkins-bot:
Add more codes to monolingual text languages

https://gerrit.wikimedia.org/r/281895