Website: Docs language selector can't switch back to English

[ashmod]

Description

When on the docs site, switching the language from English to any other language works, but switching back to English doesn't - the page stays on the previously selected language.

Plugins

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OpenCode version

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Steps to reproduce

1. Go to /docs (English)
2. Switch Language to anything (e.g. French) so it navigates to /docs/fr
3. Switch back to English - page stays on French (auto redirects to /docs/fr)

Screenshot and/or share link

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Operating System

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Terminal

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[github-actions]

This issue might be a duplicate of existing issues. Please check:

• Changing language from Spanish to English doesn't work #14409: Changing language from Spanish to English doesn't work (same symptom — switching back to English fails)
• [Bug]: Language selection fails when switching from non-English to English #16278: Language selection fails when switching from non-English to English (same root cause identified with middleware cookie logic)

If this is a duplicate, please close this issue and continue the discussion in one of the above.