Short answer
HubSpot's KB: create multiple knowledge bases to organize content for different audiences, products or brands. Service Hub Enterprise allows up to 100 knowledge bases and 10,000 articles per account. It needs a Service Hub seat and Super Admin or Knowledge base settings permission.
1. In HubSpot
The relevant screen in my demo portal.
2. Worth knowing
Professional accounts get one knowledge base. For languages instead of audiences, use multi-language articles.
3. Related
Knowledge base visibility and styling.