Languages supported: let the customers add their own languages.

I agree that allowing customers to contribute translations could be a useful way to expand language support, especially for smaller markets where an official translation may not yet be available. A community-driven approach could also help Calendly identify which languages users need most.

I run an independent informational site, Show-N-Prove, where I also look at how online services and digital platforms can better serve different audiences. It would be interesting to see whether Calendly could introduce a reviewed community translation system while keeping terminology consistent across the interface.

Polish support would definitely be a useful addition if there is already demand for it.