Wiki admins set wgInterwikiMagic=false when they do not want any interwikis displayed in the sidebar as interlanguage links. It is reasonable to expect they might add some interwikis that looks like a language interwiki, linking to another wiki. If that's done, MediaWiki incorrectly reports them as language interwiki, which isn't correct. This causes unexpected things like T130381.
|Open||None||T152961 Improve tests suite|
|Open||None||T186323 Travis and Appveyor: Major improvement to test time|
|Open||None||T265640 phe-tools: Match&Split bot is not running because of python2 deprecation in pywikibot|
|Resolved||Xqt||T213287 Drop support of Python 2.7|
|Resolved||Goal||Xqt||T225591 Make Travis and Appveyor pass again|
|Open||None||T243669 Travis fails on generate_family_file_tests.TestGenerateFamilyFiles|
|Open||None||T130381 wiki.musicbrainz.org has started reporting multiple languages|
|Resolved||Urbanecm||T245931 interwiki map API shouldn't add language parameter when InterwikiMagic is false|
Note this won't currently help with T130381: wiki.musicbrainz.org has started reporting multiple languages as https://wiki.musicbrainz.org/api.php?action=query&meta=siteinfo&siprop=general&format=jsonfm&formatversion=2 indicates that wiki.musicbrainz.org has $wgInterwikiMagic set to true.