Korean localization missing: UI labels and auto-generated conversation titles

Summary

The Claude desktop app does not respect the system language setting (Korean).
Two related issues:

1. UI labels are hardcoded in English

Sidebar elements remain in English even when macOS system language is set to Korean:

• "New session", "Routines", "Customize"
• "Pinned", "Drag to pin", "Recents"
• Tab labels: "Chat", "Cowork", "Code"

2. Auto-generated conversation titles are always in English

Conversations conducted entirely in Korean still receive English titles (e.g., "Translate all content to Korean", "Add image file to project", "Food product label requirements"). The title-generation model appears to default to English regardless of conversation language.

Environment

• Platform: macOS (Darwin 25.4.0)
• App: Claude desktop (Code tab)
• System language: Korean

Expected behavior

• UI labels should localize based on system language
• Auto-generated titles should match the conversation language

Actual behavior

All UI chrome and generated titles are in English