a.l.e ,Thanks for your advice!
I submitted to a report in bug tracker.
Awesome!, It has been fixed soon! (While I writing this reply)
Thanks for scribus developer franz!!
I think that Scribus v1.5.0 is be better than before ver.
It was able to export un-embed PDF that using ttf font including 2-byte characters.
Also category icon & name display in the Preferences dialog has been improved.
I hope further development of Scribus.