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Register Content Internationalization

Overview​

Multi-language support for OpenCatalogi register objects enables users to view and manage publication and catalog content in their preferred language. This is essential for EU Single Digital Gateway (SDG) compliance, where catalogs serve both Dutch-speaking and international audiences.

Supported Content​

The following entity fields support multi-language content:

  • Publications - Title, summary, description, category labels
  • Catalogs - Name, description
  • Pages - Title, content
  • Themes - Name, description

Language Selection​

Content language is determined by:

  1. Explicit lang query parameter on API requests
  2. Accept-Language HTTP header
  3. Configured default language fallback

Fallback Chain​

When content is not available in the requested language:

  1. Requested language (e.g., en)
  2. Default language (configured per catalog, typically nl)
  3. First available language

Frontend​

A language switcher component allows users to toggle between available languages when viewing publications with multiple translations.