Please add support for the Vietnamese language.

[duytv14]

Is your feature request related to a problem? Please describe.

OpenDeepWiki currently generates documentation primarily in English. For teams that develop software and maintain technical documentation in Vietnamese, the generated documentation requires significant manual translation and review effort.

This creates several challenges:

• Additional time is required to translate generated documentation into Vietnamese.
• Technical terminology may become inconsistent across documents.
• Development teams, business analysts, testers, and stakeholders who primarily use Vietnamese may find the generated documentation less accessible.
• Maintaining both English and Vietnamese versions increases documentation overhead.

Describe the solution you'd like

Add support for generating documentation directly in Vietnamese.

Suggested capabilities:

• Allow users to select Vietnamese (vi-VN) as the output language when generating documentation.
• Generate all wiki pages, architecture descriptions, module explanations, API documentation, and code summaries in Vietnamese.
• Preserve code identifiers, class names, method names, and technical terms where appropriate while generating Vietnamese explanations.
• Support a configurable language option at repository, project, or generation level.
• Optionally provide multilingual documentation generation (e.g., English and Vietnamese simultaneously).

Describe alternatives you've considered

• Generating documentation in English and translating it manually.
• Using external AI tools to translate generated documentation after generation.
• Maintaining separate Vietnamese documentation outside OpenDeepWiki.

These approaches increase maintenance effort and may introduce translation inconsistencies. Native Vietnamese generation would provide a more efficient and accurate workflow.

Additional context

Many software development teams in Vietnam use Vietnamese as their primary language for requirements, analysis documents, test cases, operational guides, and internal technical documentation.

Example use cases:

• Generate project wiki documentation directly in Vietnamese from source code.
• Generate architecture and module descriptions for Vietnamese-speaking stakeholders.
• Produce onboarding documentation for new team members in Vietnamese.
• Create technical documentation that aligns with existing Vietnamese BA, QA, and operational documentation standards.