Navigating to a page which is configured to redirect elsewhere results in a 404 if the user's browser isn't in English

[globau]

Summary
What is the problem?

Navigating to a page which is configured to redirect elsewhere results in a 404 if the user's browser isn't in English.

Steps To Reproduce (STR)
How can we reproduce the problem?

1. Change your web browser to Spanish
2. Visit https://developer.mozilla.org/docs/Mozilla/QA/Bug_writing_guidelines

Actual behavior
What actually happened?

Redirected to https://developer.mozilla.org/LN/docs/Mozilla/QA/Bug_writing_guidelines which is a 404

Expected behavior
What did you expect to happen?

Redirected to https://bugzilla.mozilla.org/page.cgi?id=bug-writing.html as per https://github.com/mdn/content/blob/main/files/en-us/_redirects.txt

Additional context
Is there anything else we should know?

Originally filed by CarlosT as https://bugzilla.mozilla.org/show_bug.cgi?id=1740704

[japneetsingh035]

Hi @globau, I would like to work on this issue. Please let me know if it is up for grab!

[globau]

@japneetsingh035 My involvement here is just to shift the issue into GitHub, so I can't speak for the MDN team.
It appears this issue hasn't even been triaged, so I don't know what its status is.

That said, given the lack of activity it sure appears to be up for grabs!

[caugner]

Here's what happens:

1. https://developer.mozilla.org/docs/Mozilla/QA/Bug_writing_guidelines redirects to https://developer.mozilla.org/es/docs/Mozilla/QA/Bug_writing_guidelines
2. Since that page doesn't exist, it requests https://developer.mozilla.org/en-US/docs/Mozilla/QA/Bug_writing_guidelines to see if it exists and gets a 302.

So what we should do is parse that 302 response and show something like:

The page you requested doesn't exist in (language), but the English version redirects here: (url)