GPT-5.4 swapped English words for Arabic
Resolved 💬 2 comments Opened Mar 20, 2026 by mstallone Closed Mar 21, 2026
💡 Likely answer: A maintainer (github-actions[bot], contributor)
responded on this thread — see the highlighted reply below.
What version of Codex CLI is running?
0.116.0
What subscription do you have?
Pro
Which model were you using?
gpt-5.4
What platform is your computer?
Darwin 24.6.0 arm64 arm
What terminal emulator and version are you using (if applicable)?
Ghostty
What issue are you seeing?
In the output, the model generated an Arabic word in an English sentence while working in an English repository
On worker restart, startup reconciliation, or alarm reconciliation, a launch that is still داخل the intended recovery window can be downgraded to failed early
I originally thought this was a tokenization/unicode rendering problem; however, the standalone translation of that word makes sense in the context of the sentence (though, I could be wrong as I don't speak Arabic).
What steps can reproduce the bug?
Uploaded thread: 019d0d24-9bd7-7770-abd3-20f7e54b9b6d
What is the expected behavior?
If working with Codex in a specific language, the model should not change languages.
Additional information
_No response_
2 Comments
Potential duplicates detected. Please review them and close your issue if it is a duplicate.
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Thanks for the bug report. We'll share the feedback with the team responsible for training our codex models. We're tracking this feedback and similar reports so we can improve future models. And thanks for using the
/feedbackcommand. That additional information is useful.