> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.bigcommerce.com/developer/learn/courses/catalyst-core/expanded/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.bigcommerce.com/_mcp/server.

# Module 4: Expanded Concepts

> Build amazing commerce solutions powered by the BigCommerce platform

## Docs

- [Multi-Language](https://docs.bigcommerce.com/developer/learn/courses/catalyst-core/expanded/i18n.md)
- [Handling Images](https://docs.bigcommerce.com/developer/learn/courses/catalyst-core/expanded/images.md)
- [Customer Session Management](https://docs.bigcommerce.com/developer/learn/courses/catalyst-core/expanded/customer-session.md)
- [Deploying Your Catalyst Storefront](https://docs.bigcommerce.com/developer/learn/courses/catalyst-core/expanded/deploying.md)
- [Lab - Deploy Catalyst to Vercel](https://docs.bigcommerce.com/developer/learn/courses/catalyst-core/expanded/lab-deploy-catalyst.md)