✔ sh is a well-formed language code.

✔ This seems to be a code for an actual language.

✖ This language code is not enabled on Translatewiki.

✔ This language code is available for general use in MediaWiki.

✔ This language is available for general use on Wikidata.

Project	Localization status
Wikipedija	The language is not enabled in Translatewiki.
Wikirječnik	The language is not enabled in Translatewiki.
Wikibooks (Incubator)	The language is not enabled in Translatewiki.
Wikiquote (Incubator)	The language is not enabled in Translatewiki.
Wikisource (Incubator)	The language is not enabled in Translatewiki.
Wikiversity (Incubator)	The language is not enabled in Translatewiki.
Wikivoyage (Incubator)	The language is not enabled in Translatewiki.