openai / openai/codex

ChatGPT iOS auto-generated conversation title unexpectedly in Chinese (Conversation is in English actually)

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app bug iOS session
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Description

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

CChatGPT Powered by Codex & OWL Version 26.803.41515 Released Aug 6, 2026 © OpenAI

What subscription do you have?

Plus

What platform is your computer?

Darwin 25.6.0 arm64 arm

What issue are you seeing?

Subject:

Image

On August 10, 2026, ChatGPT automatically generated a Chinese title for an entirely English-language conversation.
The generated title was:
创建交易讨论手册
which means approximately “Create Deal Discussion Playbook.”
The semantic title is appropriate, but the language is not. I did not use Chinese anywhere in the conversation and did not request a Chinese title.
This occurred in the ChatGPT iOS app. I have attached a screenshot showing the Chinese conversation title in the notification while the underlying conversation is in English.
This appears similar to previous reports from users of auto-generated ChatGPT titles appearing in random languages.
Expected behavior: The conversation title should be generated in the language of the conversation or the user's configured ChatGPT language.
Actual behavior: An English conversation received a Simplified Chinese auto-generated title.
Please investigate whether the conversation-title language-detection/generation system is incorrectly selecting languages.

What steps can reproduce the bug?

Feedback ID: no-active-thread-019feec9-5439-7cb0-91bb-da62ad94a926

What is the expected behavior?

The notification and UI showing the conversation title in US English

Additional information

none

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the supplied Feedback ID and the attached screenshot, then determine whether this repository contains the iOS conversation-title or language-detection entry point. Compare the reported English conversation with the generated Simplified Chinese title and identify a reproducible diagnostic path. Done means establishing the responsible component and verifying that titles follow the conversation or configured language.

Written by the indexing model from the issue text.

Assessment

Tech stack
ios
Domain
internationalization, mobile-dev
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
25/100

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