Update imported font linkage class during runtime?

All of the text fields in my swf use my custom library fonts, which import in from a shared swf file.

Is it possible to update the imported font linkage class, such that I can switch the font of all text fields using this font during runtime?

The reason I want to do this is when switching to Chinese/Japanese/Korean in my app, I'd like to switch to a Unicode font, whichout having to update every single text field.

Thanks in advance.