Interesting stuff whichever way it seems.
A couple points.
Spelling, at least in English was not consistent right into the early 1800's, maybe later. It's not unusual to see things written by even the well educated that have the same word spelled different ways on the same page. Printers probably corrected for books but written letters often were a bit sloppy.
So I'd expect spelling of words in languages without Latin roots to be even less consistent.
The classics were taught rather solidly, most advanced education included Latin. Especially in catholic schools since the Mass was in Latin.
I'm not sure about the flat earth thing being religious. I thought the religious one was a earth centric instead of Copernican heliocentric model of the planets?
It's hard to tell if the people who made up the negatives and did the photo printing would have been well educated or catholic, but since photography was a developing technology(Unintended pun, but I'll go with it
) It's likely they were more than simply trained workers.
Steve B