Shoutbox

the choice of one language online was made for many resorts. It brings consistency, makes sure everybody gets the same help everytime and technically, it's more difficult that you would think to support many scripting language: each language has its own restrictions, for example, some allow you to pass variables by value, others by reference. I you chose a language that assumes the second, then you're screwed when you'll want to support a language that supports only the first.

Several thigns like that exist for every language and sticking to one language (here, JScript) helps make sure scripting is kept simple, efficient and optimised in its own environement. More choice is not always better.