@Amire80 @jhsoby What's your opinion about this request?

Probably okay, but for which things will it be used, for example?

In T266423#6578061, @Amire80 wrote:

Probably okay, but for which things will it be used, for example?

@UWashPrincipalCataloger Can you answer this question?

The immediate use will be to add the Carolinian language form of official name to the Wikidata item for Northern Mariana Islands. However, I imagine it will be used for other items related to Northern Mariana Islands that have a Carolinian name for the item. That could include individual islands in the Northern Marianas, names of persons from that place, corporate bodies, works with a title in Carolinian, and websites whose language is Carolinian. Of course, it could potentially be used for anything that has a name in Carolinian.

OK, fine with me.

Change 636742 had a related patch set uploaded (by Mbch331; owner: Mbch331):
[mediawiki/extensions/Wikibase@master] Add monolingual language code for Carolinian (cal)

https://gerrit.wikimedia.org/r/636742

Change 636744 had a related patch set uploaded (by Mbch331; owner: Mbch331):
[mediawiki/extensions/cldr@master] Add monolingual language code for Carolinian (cal)

https://gerrit.wikimedia.org/r/636744

Change 636744 merged by jenkins-bot:
[mediawiki/extensions/cldr@master] Add monolingual language code for Carolinian (cal)

https://gerrit.wikimedia.org/r/636744

Change 636742 merged by jenkins-bot:
[mediawiki/extensions/Wikibase@master] Add monolingual language code for Carolinian (cal)

https://gerrit.wikimedia.org/r/636742

So when will this language code be active and usable in Wikidata? I just tried to use it and it was not recognized.

It was merged last Wednesday, so it should be available somewhere this Thursday (after new code has been deployed to Wikidata)