WARNING: What is mentioned below is purely for your own experiment. I provide no guarantee on the effect (as I also have to experiment and find the best fit on my own). Do back the specific branch of your registry before you do any modification (just export the branch into a text file beforehand, and re-import it if your modification doesn't work).
Look at the default font links you have. What these font links do is to automatically switch to another font if the glyph required by a document does not exist in the default font. For example, when you set Lucida as the default font for your Notepad, what happens when the system finds a character whose glyph is not included by the font Lucida? Your system will look at the font links, and try to retrieve the glyph instead from one of the linked fonts. So if you include a font including Chinese glyphs in its font link, Notepad will be able to display Chinese properly.
Format of each entry in the font links:
path_and_file_to_link_to, font_face_name\n
So all you need to do is to manually tweak the font links and add a new line there to include whatever font you deem suitable for your use.
