What programming language(s) were used to create Knytt Underground?

I've seen both python and java mentioned, but I'm curious to hear from the creators or someone who knows for sure.

Like most (all?) Nifflas games, Knytt Underground was made with Multimedia Fusion 2 and then 'exported' to C++ with the Chowdren framework. Python is the language used for scripting (i.e. to program quests and game events).

I assume when you say Java you're referring to the Java Editor: it's not an official editor and has nothing to do with the game. Otherwise, I know in Multimedia Fusion 2 you can export to Java as well, but I don't know much about it.