We currently use ezPDF [url removed, login to view] to produce PDF reports in English.
We have recently been approached by a Korean company to internationalize our product. ezPDF currently does not seem to support Korean characters.
I have looked around for other components in PHP which support Korean characters and although there are a few, it is a mammoth task for us to completely rewrite our reporting functionality.
I predict the 'right' person could extend ezPDF relatively simply especially with other components on the Web to use for example.