I run into this problem quite often. Has anyone proposed creating an alias for each character that indicated that it was chinese, japanese, or korean? In this way you could mix words within documents and when it is rendered each language could be represented by different fonts? The same could be used for variations in chinese -- so that if you used a Hong Kong Cantonese or Taiwanese namespace or alias it would use traditional characters, and if using a Mandarin, or Singapore Chinese namespace it would use simplified characters.