I hope this is okay to bump a year or so later.
I have also downloaded and loaded up an Adobe font but I want to swap out The A, R, O, C, N, D, F, H, and E for their alternate Glyphs site-wide anywhere they appear.
If I can figure one letter out I might be able to figure the others out in code. I tried the first code in the responses but it doesn't work and with all the changes over time I'm not sure if It's just different now or if it's how I tried to do it.
I'm not very quick or experienced with code and help would be Greatly Appreciated.