claude-code - 💡(How to fix) Fix [BUG] Terminal title incorrectly shows "Russian language input acknowledged" for Ukrainian (Cyrillic) input [1 comments, 2 participants]

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anthropics/claude-code#46229Fetched 2026-04-11 06:25:44
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Error Message

Error Messages/Logs

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Preflight Checklist

  • I have searched existing issues and this hasn't been reported yet
  • This is a single bug report (please file separate reports for different bugs)
  • I am using the latest version of Claude Code

What's Wrong?

When using Claude Code with Ukrainian language input (Cyrillic script), the terminal window title displays:

Russian language input acknowledged

This happens despite having "language": "Ukrainian" explicitly set in settings.json.

What Should Happen?

The terminal title should correctly identify Ukrainian — or not show language detection at all.

Error Messages/Logs

Steps to Reproduce

  1. Set "language": "Ukrainian" in ~/.claude/settings.json
  2. Start Claude Code in any project
  3. Type a message in Ukrainian (Cyrillic script)
  4. Observe the terminal window title

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

No response

Claude Code Version

2.1.100

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

No response

extent analysis

TL;DR

The issue may be resolved by updating the language detection logic in Claude Code to correctly identify Ukrainian language input.

Guidance

  • Verify that the settings.json file is being read correctly by checking the file path and contents.
  • Check if the issue persists when using a different Claude model or version.
  • Investigate the language detection logic in Claude Code to see if it is correctly handling Cyrillic script and Ukrainian language input.
  • Consider adding a debug log or console output to verify the language detection result.

Example

No code snippet is provided as the issue does not contain sufficient information about the codebase.

Notes

The issue may be specific to the Sonnet model or the Anthropic API, and further investigation is needed to determine the root cause.

Recommendation

Apply workaround: Update the language detection logic in Claude Code to correctly handle Ukrainian language input, as the current version (2.1.100) may not have the correct implementation.

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