✔ swi 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 is not yet available for general use in MediaWiki.

✖ This language is not yet available for general use on Wikidata.

Project	Localization status
Wikipedia (Incubator)	The language is not enabled in Translatewiki.
Wiktionary (Incubator)	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.