api.php?action=sitematrix&format=xml shows (excerpt)
<api>
<sitematrix count="784"> <specials>
...
<special url="http://beta.wikiversity.org" code="betawikiversity" />
...
</specials>
...
<language code="en" name="English"> <site> <site url="http://en.wikipedia.org" code="wiki" /> <site url="http://en.wiktionary.org" code="wiktionary" /> <site url="http://en.wikibooks.org" code="wikibooks" /> <site url="http://en.wikinews.org" code="wikinews" /> <site url="http://en.wikiquote.org" code="wikiquote" /> <site url="http://en.wikisource.org" code="wikisource" /> <site url="http://en.wikiversity.org" code="wikiversity" /> </site> </language>
...
</sitematrix>
</api>
The tag within <language> should be <sites> instead of <site> like <specials> is.
Version: 1.14.x
Severity: minor