[BUG] MIssing accent on letters in french.

Preflight Checklist

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

What's Wrong?

When Claude anwer me or write documents, it forgot to put the accent on letters (é è à, ê, â, û, ù)
It doesn't happen on the "steps" text (so the one during the process), only the final text or document it creates.

What Should Happen?

When Claude anwer me or write documents, it should put accent on letters (é è à, ê, â, û, ù)

Error Messages/Logs

Steps to Reproduce

1. Start a conversation in French
2. Notice that its answer lack of accent on letters.

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

4.0

Claude Code Version

2.1.31

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_