https://meta.wikimedia.org/wiki/Interwiki_map should really have a json file behind it, and the page that displays it running a scribunto/lua module to format the table nicely...
I don't know how many direct dependancies there on that page; hopefully only really MediaWiki-extensions-WikimediaMaintenance.
https://codesearch.wmcloud.org/search/?q=Interwiki_map&files=&excludeFiles=&repos= seems to concur