Do you have any "particular problem" in mind? You don't mention one. I think the trouble with single-purpose languages is that, realistically, their developme

Do you have any "particular problem" in mind? You don't mention one. I think the trouble with single-purpose languages is that, realistically, their development needs to be motivated by a real problem not satisfactorily addressed by an existing language. And since the people with these problems are not often going to be language designers, most such opportunities will be missed. I'm frankly surprised by the existence of Julia.