Is ULS dual licensed MIT and GPL?
https://www.mediawiki.org/wiki/Extension:UniversalLanguageSelector lists both
https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/UniversalLanguageSelector/+/master/extension.json#18 says GPL-2.0-or-later (but the field only takes a string... See T251642: Make Special:Version/License support multiple license files in a repo)
But then https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/UniversalLanguageSelector/+/master/GPL-LICENSE and https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/UniversalLanguageSelector/+/master/MIT-LICENSE exists in the repo