Intermittent unexpected non-Korean token in assistant progress messages (e.g., "հիմա")

What version of the IDE extension are you using?

0.4.73

What subscription do you have?

Not sure (using Codex in personal workspace)

Which IDE are you using?

vs code

What platform is your computer?

Darwin 25.2.0 arm64 arm

What issue are you seeing?

Summary

While interacting with Codex in Korean, the assistant occasionally inserts an unexpected non-Korean token in progress updates (example: հիմա), even though the conversation language is Korean.

Environment

• Product: Codex (coding agent)
• Workspace: local monorepo
• Language context: Korean
• Date observed: 2026-02-12

Expected behavior

• Responses should remain fully in Korean (or the explicitly requested language).
• No unrelated foreign tokens should appear in normal output.

Actual behavior

• A sporadic foreign token appears in an otherwise Korean sentence.
• Example observed token: հիմա (Armenian, meaning “now”).

Reproduction (best effort)

1. Start a Korean conversation with the coding agent.
2. Ask for iterative implementation with multiple progress updates.
3. Observe occasional progress messages.
4. Intermittently, an unrelated foreign token appears.

Frequency

• Rare / intermittent
• Seen in progress-update style responses

Impact

• Reduces trust/readability of assistant output
• Looks like output corruption or language-mixing bug

Notes

• This is not a repository code bug; it appears to be assistant output-quality behavior.
• I can provide exact prompt/response snippets if needed.

What steps can reproduce the bug?

Steps to Reproduce

1. Use Codex in a personal workspace with Korean as the conversation language.
2. Ask for a coding task that triggers multiple progress updates during implementation.
3. Read the assistant’s intermediate progress messages.
4. Occasionally, an unexpected non-Korean token appears in the message (example: հիմա).

What is the expected behavior?

Expected Behavior

All assistant messages should stay in the user’s requested language (Korean in this case), including intermediate progress updates, with no unrelated foreign-language tokens.

Additional information

_No response_