Month names collection / metastudy

[eggyk]

The language itself is just whichever dialect of german this is, I think. In that part of the manuscript, there is also a Latin paragraph for each month. 

Let's take the month of november.  Both nouembre and nouember appear alongside the german name, but it's not clear exactly why. Here you can see 'nouembre' as part of the Latin paragraph for november:
   

And at the bottom of the German paragraph below that, the writer uses 'der november':
   

As for why they needed to mix the names at all, it's clear that both the latin and the german names were in concurrent use by academics for a long time. This sentence demonstrates this: 
   

"In nouembre, das ist in dem dritten herbstmon..."
"In november, that is in the third autumn month, ..."

The writer felt it necessary to express both names for clarity, perhaps so a larger range of people could understand which month was being discussed. This is very commonly seen in these manuscripts. A modern day example would be something like an british person saying "in the autumn (in the fall) ..." so that Americans would be more likely to understand. 

 If I were to speculate, these examples may have been "mistakes" when writing the latin names. A "mistake" in the sense that whoever wrote this text was used to writing them in french, so when writing 'nouember', their muscle memory sometimes wrote the almost identical french 'nouembre'? I honestly don't know.