I am using the "Museum Timeline" exhibit. It works and looks great! How can I let users choose between 2 languages (English or Dutch) ? Can I do this in CML or do I need to dive into the AS3 code?
Unfortunately, there is not a built-in locality system so yes you would need to do this on your own. In the past, I have used the CML State tag to define the different states, then triggered the loading of the the states in AS3. See the State example and corresponding CML file.