Not trying to be confrontational, genuinely curious.. but why is this an area where you'd want a DSL?
My initial reaction is : When I'm learning a topic, the last thing I want to be worrying about is learning the ergonomics of a new language
I'm guessing there's a good rational I'm missing
it'd be nice to see some piece of compiler related code in this language that'd be ugly in a general purpose language
Once students where proficient in Pascal, we could introduce compiler classes and, when sufficiently advanced, show what the Pascal BNF grammar looked like. So students had a complete picture of a language. Pascal's BNF grammar is very simple.
Also, Pascal enforces strong program structures (BEGIN, END, PROCEDURE, FUNCTION, etc). which helps to frame practical work.
But the point of teaching compiler development is to teach people how to do the basic things from tokenizing, parsing, semantic checking, and code generation (directly to machine code).
I have found this is actually a skill most programmers don't even know how to do, especially just tokenizing and parsing, so I thought I'd use Oberon-07 as a base/inspiration for it.
n.b. at the time of this comment, the repo/project is not even 24 hours old yet.