Terminal title (pane_title) should follow conversation language

Description

Claude Code sets the terminal title (via escape sequences) to a conversation summary, which is useful for tmux automatic-rename-format '#{pane_title}' to show meaningful window names.

However, the title is always generated in English, even when the entire conversation is in another language (e.g., Traditional Chinese / 繁體中文).

Current behavior

Conversation in Chinese → terminal title: ✳ Customize Moshi shortcuts and command order

Expected behavior

Conversation in Chinese → terminal title: ✳ 自訂 Moshi 捷徑與命令排序

The title language should match the conversation language.

Context

This matters for developers who use tmux with automatic-rename-format '#{pane_title}' to manage multiple Claude Code sessions. When all titles are in English but the work is in another language, the mental mapping breaks.

# tmux window list currently shows:
1: ✳ Update chat conversation layout
2: ✳ Database domain field investigation
3: ⠐ Customize Moshi shortcuts and command order

# Would be more useful as:
1: ✳ 更新聊天對話版面
2: ✳ 資料庫 domain 欄位調查
3: ⠐ 自訂 Moshi 捷徑與命令排序

Environment

• Claude Code 2.1.96
• tmux 3.4
• Ubuntu 24.04

🤖 Generated with Claude Code