Bug: --lang zh parameter not working - Generated files remain in English

[BeckXun]

Description
When using --lang zh parameter, all generated files are still in English instead of Chinese.

Steps to Reproduce
npx cc-sdd@latest --claude --lang zh

Selected option 2 (Append updates) during installation.

Expected Behavior
All generated files should be in Chinese, including:

CLAUDE.md
Templates in .kiro/settings/templates/
Commands in .claude/commands/kiro/

Actual Behavior
All 37 generated files contain English content only.

Environment
OS: MacOS
Node.js: v18.20.6
npm: 10.8.2
cc-sdd: latest (via npx)

Installation Log

Question
Is Chinese language support fully implemented? If so, what's the correct language code to use?

[gotalab]

@BeckXun
Thanks for the clear report and for including all the details!

A quick clarification on how --lang zh currently works:

• Language is controlled only via:
  • CLAUDE.md
  • spec.json
• The files under:
  • .kiro/settings/templates/
  • .claude/commands/kiro/
    are intentionally kept in English.

The reason is to save tokens and keep the core templates/commands lightweight. So seeing those files in English is expected behavior, not a bug.

With --lang zh, the specs and steering content generated by the agent are expected to be in Chinese. The language setting applies to the generated output (specs, steering docs, etc.), not to every scaffolded file.

If they still come out in English, it’s likely that the instructions in CLAUDE.md → ## Development Guidelines are not strong enough. For example:

## Development Guidelines (Generated by AI)

- 所有的规格说明（spec）、文档和 steering 内容，一律使用中文撰写。
- 除非用户在对话中明确要求英文，否则不要使用英文回复。

Once Development Guidelines explicitly force Chinese, the overall output of specs and steering should largely switch to Chinese while templates/commands remain in English by design.