A little language theory for vowels
I've been spending the last few days going over my notes, and trying to find further information that can be gleaned from the maps to translate the unknown erajan words, and I've come up with a theory based on the following:
raa = very, very (from final exam)
essa = love (blue memo)
jor = name (classroom wall)
joro = father (blue memo)
jora = mother (from tomb letter - deduced meaning based on context and translation for father)
The game is very, very specific about the translation for raa. Because it follows many conventions for prefixes as an adjective, I think that we can deduce that ra = very if raa = very, very.
So, adding an 'a' changes the meaning of the word it's added to. My first thought was that it "exaggerates" the word that it follows, but I think that a cleaner definition is that it acts as a kind of 'operand' and exactly doubles it: raa = ra ra, essa = ess ess, jora = jor jor. In the archives, the news paper states that Kaitlin Je Ari is named by erajan tradition, and given her mothers surnames. This implies that erajans typically inherit two names from their mothers, so 'a' acting as an operand in jora to 'jor, 'jor' makes sense - your two surnames names come from your mother in this culture (mother = two names).
If this applies to essa: essa = ess, ess -> ess = 'heart' or something similar.
It follows that other vowels or vowels in general may have special rules when used on their own as affixes. I would hazard a guess that 'o' in joro may perform some other operation on the prior word, but I haven't been able to deduce what it might be (it could be added to distinguish from both jor and jora: jor/o - not your name, but related to it).
I think that we can deduce at least one more vowel operand: i (this one is more speculative, though).
At the north pole of the map, the letter 'i' is on its own. Well, what is the north pole? Of course, it is the only reachable portion of the planet's core: its central axis - literally the core of the earth. Both inn and iss begin with 'i': the two cardinal directions that point to the mora's polar axis.
This may sound crazy at first, but perhaps 'i' is also acting as a vowel operand: performing a linguistic 'core' operation the letters that follow? Perhaps when a vowel is followed by two consonants, it performs a specific 'operation' - changing or adding a specific meaning.
The south pole is actually labeled "The southern key", with a figure 8 where the pole would be. Reflecting or rotating an 's' and combining it with the first one creates an 8. iss = 8 in erajan, literally, with the i reflecting the second s and combining it with the first (or performing some other operation)?
TLDR: I think that if a vowel is followed by two consonants, it performs some operation on those consonants, creating a meaningful symbol, and a vowel at the end of a word may perform some other operation on the whole word, and 'i' means core, but it also means the operation of coring...