[KevinH]

I have had no problems loading and running Sigil Korean epubs. So this is limited to the Readium Plugin only? What encoding does your Windows machine use? Is it utf-8? What filesystem encoding does python use on your Windows system. Is it utf-8?

Have you tried debugging the path in the python code to see what actual byte sequence is produced?

No other users have reported anything similar for any non-english language. And xhtml's utf-8, Qt's utf-16 and Python's utf-32 all support the full unicode character sets.

Perhaps you can modify the reader Python code to print out the exact url that is attempting to be loaded. Try modifying def acceptNavigationRequest(self, url, req_type, is_main_frame) in plugin.py to convert the url to a string and print it to a log file so we can see what is actually happenng.