So, I somehow managed to bypass the problem. I don't think my specific question was solved, but for now it's taken care of. I cross-referenced the font (which was 华文楷体) inDesign was saying was restricted in my computer's FontBook folder. It seemed like the same font had 2 different names, one under 华文楷体 and another as STKai -- same or similar font, but one with a Chinese character name and one with an alphabet name. Also, the STKai font name in FontBook had some mysterious dot by its name...I'm not sure what that signifies, perhaps a corruption? But, I substituted all STKai in the inDesign file for a font similar to it called Kai. The problem with the 华文楷体 was then fixed.
I'm not sure what happened. My computer came with both 华文楷体 and STKai on it as freely usable fonts. InDesign won't show 华文楷体 in its font menu, though; it only shows STKai and other similar fonts, such as Kai or Adobe Kai ST. Don't know why inDesign doesn't recognize fonts named with Chinese characters.
