Heja, it looks like one of the recent edits on https://www.mediawiki.org/w/index.php?title=Template:WikimediaDownload created a rendering issue at least on one page: https://www.mediawiki.org/w/index.php?title=Extension:GraphViz (the "translate" tag is shown as raw text) - Unfortunately I don't have enough skills to understand what the exact problem is and if that's a problem with content on Extension:GraphViz or with Template:WikimediaDownload. Input appreciated if you find some time. Thank you! :)
Topic on User talk:Shirayuki
Done. Thanks. See also Thread:User talk:Shirayuki/Template:Unmaintained extension.
But more than 500 pages need to be fixed.
Why don't you ask the help of a bot? I understand those changes need to be made, but you should also perform those changes when you know you or someone else could assist you with the help of a bot to reduce the time those pages will be broken