There's a bug in the way Ubuntu displays Japanese fonts that I need fixed rather urgently.
The bug is that Ubuntu displays the wrong Japanese characters sometimes.
I'm studying Japanese, and having the wrong characters display is obviously problematic.
However, as you can see if you look at the most recent comments on the bug report, fixing the bug seems stalled on the fact that some specific fonts are probably broken, but I don't know which ones.
Here's what I think is happening. If Japanese text is used in a context where the specified font does not contain Japanese characters, then Ubuntu defaults to some other font for the words that are written in Japanese.
However, it is unclear to me what that default Japanese font would be, and how I can determine it.
Is there a way I can determine the default font being used when I see text on my screen that is showing the faulty characters?