Feature summary (what you would like to be able to do and where):

For example, https://en.wikipedia.org/wiki/google:foo should display the same thing as https://en.wikipedia.org/wiki/Special:GoToInterwiki/google:foo, rather than a nondescript bad title error

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):
https://en.wikipedia.org/wiki/MediaWiki_talk:Badtitletext#Protected_edit_request_on_18_October_2024

Benefits (why should this be implemented?):

Helps people get where they're going.