if you go inside father godwins house in uzhitz you will see that it's full of orthodox icons
there is also a cuman helmet on a shelf and two cuman swords on the wall, which tells you that he is from the east
the church also has a painting with an orthodox cross inside
with this information we can reasonably assume that father godwin is secretly an orthodox christian
personally i like to see this different culture being represented in the game, as there is not much diversity being portrayed