Ask HN: How to add multilanguage support to a flash webapp?

I'd been developing this flash application (http://apps.facebook.com/captionmashup/) and now the beta version is out.

I'm planning to add multilanguage support but I really don't have any ideas about how to implement multilanguage library for user interface.

Should I embed and hardcode all dictionary definitions into different classes?

Should I create text files and import and create language files dynamically at runtime?

I'd appreciate if you can give me some tips.