http://www.roguebasin.com/index.php?title=Category:Programming_languages

Here's a pretty good collection about various languages and their pros and cons, as well as roguelikes which implement them. I'd say to use a scripting language to do the language processing. Id use go for things like generating dungeons (my current project involves this, go is succinct and fast).

The above wiki, if you're not familiar, compiles a lot of ideas catalogued from the roguelike development community. I find it to be a great resource for brainstorming.