I believe it’s North. But it seems to vary.
What grammar terms do you see that don’t exist in English? I strongly encourage you to look at the Finnish grammar article as well, unfortunately one doesn’t exist for LingQ. Estonian and Finnish are very close in terms of grammar.
I have no clue if anyone has done this before or not. I tried to reach out to the original translator of the texts but she didn’t respond, and her work seems to not have been with the intention of publishing it on LingQ.
The requirements for Estonian to be added are as follow: Why isn't Estonian available yet when all the mini stories are done? - #2 by zoran
But don’t fret, I have already collected all that material on my own. You only need to get the grammar guide going.