Feature Request: UI Localization / Russian Language Support

Feature Request: Localization Support (Russian and other languages)

Please add localization support to Claude Code UI. Currently, all interface elements (menus, prompts, keyboard shortcut hints, status messages) are hardcoded in English within the compiled binary.

Motivation

• Claude Code is used globally, including by a large Russian-speaking developer community
• The CLI response language can already be configured via system prompts, but the TUI chrome (menus, borders, key hints) remains in English
• Localization would significantly improve UX for non-English speakers

Proposed Solution

1. Extract all UI strings into localization files (e.g. locales/en.json, locales/ru.json)
2. Add a language setting in settings.json
3. Auto-detect locale from the LANG environment variable as a fallback

Environment

• OS: macOS (arm64)
• Claude Code version: 2.1.112