Does Mac OsX Numbers have a scripting language like VBA?

Answer 1

Technically, no. There is no script language built inherently into Numbers. However, Apple machines have AppleScript built into them from a more global standpoint. It is scripting for the entire operating system as well as the software on that operating system.

That being said, there have been moments in the past when it appeared that AppleScript would be discontinued, so you are safer to take your spreadsheets and needs for scripting to Google Sheets where you can script using Google Apps Script and also enjoy cloud-based computing.