Re: [Haskell-cafe] XText vs DSL in Haskell in mission critical software

how can I convince my bosses to use existing functional languages

You don't. Instead you have a coffee and read about bosses and software at dilbert.com and hackernews. While the browser refreshes the page, you write a compiler from xtext (or whatever the current buzzword is) to Haskell and back. - J.W.