Ethereum.org links without language returns error 404

[r4f4ss]

Describe the bug

Following are example links without language specification, returning error 404:
https://ethereum.org/developers/docs/nodes-and-clients/node-architecture
https://ethereum.org/developers/docs/nodes-and-clients
https://ethereum.org/developers/docs/data-structures-and-encoding/ssz

And their equivalents with "en" language, are working (other languages are working too):
https://ethereum.org/en/developers/docs/nodes-and-clients/node-architecture
https://ethereum.org/en/developers/docs/nodes-and-clients
https://ethereum.org/en/developers/docs/data-structures-and-encoding/ssz

To reproduce

1. Visit https://ethereum.org/developers/docs/nodes-and-clients/node-architecture
2. Visit https://ethereum.org/en/developers/docs/nodes-and-clients/node-architecture

Expected behavior

Links without language should redirect to the default system language or maybe to the user preferences set up language.

Screenshots

Desktop (please complete the following information)

No response

Smartphone (please complete the following information)

No response

Additional context

This bug is probably due to migration from Gatsby to NextJS, as described here.

The migration PR makes available a link for preview, which does not have the bug and redirect pages without language to english. For this reason I think pages without language returning error 404 is a bug.

Would you like to work on this issue?

• Yes
• No

[reveriontech]

will work on this issue

[taxmeifyoucan]

+1, this breaks ton of links out there

[CodeLeom]

Can I this issue assigned to me?

[wackerow]

Fixed with #15428, closing out, thanks folks!