Polyglot programming

Here's an interesting article about a programming project that mixed C# and F# for the heavy lifting, and called external Ruby and Javascript. I think maybe the takeaway is that polyglot programming can work well when it's called for (each language has its own strengths and weaknesses).

On the other hand, I've heard comments by Rubyists that sometimes the proliferation of DSLs in typical Ruby programming makes comprehension more difficult. So ... another balance to be struck, perhaps.