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Codex Issues / #16232

UI language change not applied (affects multiple languages) on macOS

Open 💬 4 comments Opened Mar 30, 2026 by 14h4i
💡 Likely answer: A maintainer (github-actions[bot], contributor) responded on this thread — see the highlighted reply below.

What version of the Codex App are you using (From “About Codex” dialog)?

Version 26.325.31654 (1272)

What subscription do you have?

Personal account (Plus)

What platform is your computer?

Darwin 25.1.0 arm64 arm

What issue are you seeing?

Changing the UI language in the Codex macOS app does not take effect.

This issue is not limited to Vietnamese. Other available languages also do not apply after selection.

The language option is visible in Settings, but selecting a different language has no effect on the UI.

<img width="1470" height="1518" alt="Image" src="https://github.com/user-attachments/assets/ffdb8fb9-e494-4abb-a343-e5199024de5a" />

What steps can reproduce the bug?

  1. Open Codex app
  2. Open Settings (via Command Palette or macOS menu bar)
  3. Navigate to Language section
  4. Select a different language (e.g. Vietnamese or other non-English options)
  5. Restart the app (Cmd + Q → reopen)

The UI remains in English.

What is the expected behavior?

The UI should switch to the selected language after restarting the app.

Additional information

  • Issue reproducible 100%
  • Not limited to Vietnamese — affects multiple languages
  • No error message or feedback is shown
  • App logs show successful config/read and experimentalFeature calls

Possibly related to #16224

View original on GitHub ↗

4 Comments

github-actions[bot] contributor · 5 months ago

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

  • #16224

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etraut-openai contributor · 5 months ago

I'm not able to repro the problem as reported. You shouldn't need to restart the app; the UI language should update immediately after selecting it in the settings menu.

Did you see the same problem on previous versions of the app, or do you suspect this is a recent regression?

14h4i · 5 months ago

Thanks!

In my case:

  • The UI language does not update immediately after selection
  • Restarting the app also does not apply the change
  • This affects multiple languages, not just Vietnamese

I only observed this on version 26.325.31654 (1272), so it might be a recent regression.

Reproducible 100% on my machine.

14h4i · 5 months ago

Would you recommend doing a clean reinstall to help reproduce or isolate the issue?

If so, could you clarify the safest way to do this without losing existing data such as:

  • conversations / threads (including archived ones)
  • sessions
  • local configuration
  • MCP setups

I want to make sure I don't lose any important data.