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OpenAI Codex CLI garbles Chinese text
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REDDIT · REDDIT// 13d agoNEWS

OpenAI Codex CLI garbles Chinese text

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A Reddit user says OpenAI Codex CLI started inserting Chinese text into otherwise normal terminal output, despite no Chinese in the prompt. Recent GitHub issues suggest a Windows/PowerShell encoding regression is more likely than the model intentionally switching languages.

// ANALYSIS

Most likely encoding, not a language-switching model bug. The Codex repo already has Windows/PowerShell issues describing Chinese text being garbled, which is exactly the sort of mojibake you get when UTF-8 settings are bypassed.

  • –[Issue #4574](https://github.com/openai/codex/issues/4574) reports Chinese characters turning into mojibake in recent Codex versions.
  • –[Issue #4498](https://github.com/openai/codex/issues/4498) points to the Windows PowerShell stdio path, where `-NoProfile` can bypass user encoding settings.
  • –If this reproduces on Windows, check the terminal code page and shell profile before blaming the model.
  • –If it also shows up off Windows, the bug is probably in Codex’s output pipeline rather than just PowerShell.
// TAGS
ai-codingclidevtoolopen-sourceopenai-codex-cli

DISCOVERED

13d ago

2026-03-29

PUBLISHED

14d ago

2026-03-29

RELEVANCE

8/ 10

AUTHOR

secondorder_