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UI language change not applied (affects multiple languages) on macOS #16232
Description
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.
What steps can reproduce the bug?
- Open Codex app
- Open Settings (via Command Palette or macOS menu bar)
- Navigate to Language section
- Select a different language (e.g. Vietnamese or other non-English options)
- 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
Activity
github-actions commentedon Mar 30, 2026
Potential duplicates detected. Please review them and close your issue if it is a duplicate.
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etraut-openai commentedon Mar 30, 2026
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 commentedon Mar 30, 2026
Thanks!
In my case:
I only observed this on version 26.325.31654 (1272), so it might be a recent regression.
Reproducible 100% on my machine.
14h4i commentedon Mar 31, 2026
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:
I want to make sure I don't lose any important data.