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Feature Request: Add i18n / Chinese (Simplified) UI Language Support #32514
Description
Summary
Add internationalization (i18n) support to OpenCode's TUI and CLI interface, starting with Simplified Chinese (zh-CN) as the first supported locale.
Motivation
Many developers in China prefer working in a Chinese-language environment. Currently, all OpenCode interface text (prompts, error messages, status indicators, help text, etc.) is hardcoded in English, which creates a barrier for Chinese-speaking users.
Proposed Solution
- Extract all user-facing strings into a locale file system (e.g., JSON-based translation files)
- Add a locale config option in opencode.json / tui.json (e.g., "locale": "zh-CN")
- Support LANG/LC_ALL environment variable detection as fallback
- Provide a complete Simplified Chinese translation as the first locale
Alternatives Considered
- Using AGENTS.md to instruct the AI to reply in Chinese (works for AI responses, but not for the tool's own UI text)
- Environment variable OPENCODE_LOCALE (simpler but less flexible than config file approach)
Additional Context
OpenCode's documentation website already supports Simplified Chinese (简体中文) in its language selector, which shows the project's awareness of Chinese-speaking users. Extending this support to the CLI/TUI interface would be a natural next step.
Activity
github-actions commentedon Jun 16, 2026
This issue does not fully meet our contributing guidelines.
What needs to be fixed:
[FEATURE]:for feature requests (e.g.[FEATURE]: Add i18n / Chinese (Simplified) UI Language Support)Please edit this issue to address the above within 2 hours, or it will be automatically closed.
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github-actions commentedon Jun 16, 2026
This issue has been automatically closed because it was not updated to meet our contributing guidelines within the 2-hour window.
Feel free to open a new issue that follows our issue templates.