We don't. I doubt Father Luc would agree to teach Latin at the covenant (he doesn't really have time anyway).
Adeline would be able to teach some Latin (she has a score of 4 and Com +2) at least a season per year, now that things are settling down for her. She'd even get better avor time, developping her Teaching score.
Julius the Steward is also a decent teacher. He has Latin at 6, Ancient Greek at 4, Magic Lore at 4, Artes Liberales and Philosophiae at 2. He even has a decent Teaching score of 3, with a specialty in teaching languages, and has Com +1. His availability would probably be limited to one season per year.
Julius hasn't had an incentive to teaching Latin to covenfolk, because he has the Gift of Tongues. So he already understands and is able to speak to anyone.
I believe so. We can also introduce an hermetic eremite. There are about half a dozen eremites in Normandy according to tL&tL, maybe one of them is close to us. An alpine eremite is also possible, I think there is nothing in law that directly forbids that... But just as in Normandy he might not enjoy some of the protections associated with being in a covenant.
No. It is meant to be a quirk, not a major liability. So the longer you "imprint" an area, the more stable it remains.
For example, if you were to spend a season or two away from your sanctum, the worse that might happen is that you find a new window has opened or an existing one has migrated from one wall to another.
If you leave for a year or two, then perhaps a colony of mice has built a small suspended city in the rafters.
If you are absent for a decade or more, then you might find that your lab has changed a lot.
But that is not a small deal... if a window moves and leaves your laboratory in the dark, or causes that an element that depended on it to stop working (such as an astrological object), it can mean a lot.
And if instead of a window, a beam or column moves, say goodbye to your sanctum xD
So, as i understand it, you can lose lab virtues or obtain lab flaws randomly if you go away one or two seasons
I'd say that this is much less problematic than the window above xD I mean, having a colony of mice is something normal in middle ages. And you can just solve it with a spell or two
It won't. Those are just examples. Note that a window moving (not disappearing) won't change your lab's virtues and flaws.
The point is that a season or two will only result in cosmetic changes. A year or two might (or might not) result in a new minor virtue/flaw (or combo) appearing. A decade could mean some major changes.
The pace of change is also all weighted by how long you've occupied the space. So changes will be slower if you've been there for several years and have spent several seasons customizing your space, than if you've only lived there for a couple of seasons.
My impression is that his effect is largely intended to add flavor to the fact that the location is in a powerful aura site aspected towards Muto. Not really to create a penalty but more just to make the presence of that raw magic in the location be somewhat that is felt a bit and colors/adds character to the overall feel of the Covenant. I think it is a positive influence / aspect to the game if all of that is accurate.
