I contacted Rick and he has just answered that Bibles will now have special unicode support. If I got it right, when a character is not present in your default font, it will display it using the best font available. I have seen Microsoft Word does something similar.
I correct myself. The system does not choose the font it thinks better: you can choose what font to use. There's a new Unicode field in the Details table, where you can specify the name of the font. Also, the language has to be set to "Unicode" instead of "Default" or "Hebrew" or whatever.
So the font is hard-coded in the module, not in every verse.
Rick sent me a sample file and it works great.
He's having a lot of patience with me and fixing all the issues I've come across.