Domain Specific Languages (DSL) and Domain Driven Design (DDD)

Domain Driven Design (DDD) is a way of thinking and communicating about the problems and its solutions.

Domain Specific Language (DSL) is a way of writing code.

They're similar because they both start with the word "domain". That's it, I guess. :-)

The differences, one is an approach to building systems using a Domain Specific Language language (DSL) instead of a General Purpose Language and the other is an architectural approach (DDD) to designing and building systems.

The similarity is that they both focus on the specific domain.