Domain Specific Language is an amazing concept for many years. Any particular choice of DSL can be re-used and converted to another DSL type

Below are the benefits of DSL

• Convert DSL to source code
• Use DSL to trigger many application modules
• Use DSL to build script
• Use DSL for business process
• Convert a visual diagram to source code
• Use DSL for Dev-Ops

Examples of DSL

Many languages can be combined together, languages can be invoked or called or directly used as follows

• Python
• R
• JavaScript
• Haskell
• PHP 
• Ruby
• etc..

All these languages can be embedded and invoked from many languages using engines like Rhino for JavaScript

This benefits 

• Reuse
• Virtualize
• Route
• Embed

Example