(Bug coming from #51430 comment)
As far as I can see, these links are not marked "mw:WikiLink/Language" but
simply "mw:WikiLink". So, it's not possible to make any difference between them and "normal" wikilinks.
See a the end of this page for example:
http://parsoid.wmflabs.org/ko/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC:%EB%8C%80%EB%AC%B8
Version: unspecified
Severity: normal
The reason might be that those are marked as "local" in the interwiki info returned from the API. That means that there is a redirect configured from http://en.wikipedia.org/wiki/ko: to http://ko.wikipedia.org/wiki/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC:%EB%8C%80%EB%AC%B8.
We should still mark them as language links as that is the way they are interpreted by the PHP parser. Pointing the href to the absolute URL ending in /wiki/ should also be fine as that redirects to the wiki's main page just as the local redirect does.
Change 81413 had a related patch set uploaded by GWicke:
Bug 53243: Accept prefix-only interwiki / language links
See bug 53432 for a related serializer bug uncovered by the tests added in the patch above.
Change 81413 merged by jenkins-bot:
Bug 53243: Accept prefix-only interwiki / language links
Now deployed in production.
Note that we are planning to rename some of these typeofs. mw:WikiLink/Language will likely become mw:PageProp/Language. See https://bugzilla.wikimedia.org/show_bug.cgi?id=53432 for the details, and let us know if you see issues for Kiwix.
THX. As long as I can identify the language links, this is good to me; whatever how this is labelled.