How to specify that .PDF form fields use specific fonts?
Is there a way to embed a font in an interactive .pdf so that only it can be used to type in fields?
I am fairly certain that InDesign doesn't have this capability, but do you know if this is at all possible in other programs?
When you specify the font for form fields in Acrobat, that font gets fully embedded (except CJK fonts, of course). It may be that InDesign does that too, but in this respect, I would not trust InDesign (could by my prejudice).
Conclusion, use Acrobat to finish the form fields.