I think I recognize the Language Construction Kit format when I see it...

Trajan is now used only for secret communication between the Trajev and to
record new information...
If this is true, then the language would only be used in maps as part of the collection of information. So the map would probably never find its way to the general public.

*LANGUAGE FEEDBACK*

Note that consonants cannot follow one another and, with the exception of 'tr', consonant clusters cannot appear at the beginning...
It may just be me, but this seems like a contradiction. If consonants cannot follow one another, then consonant clusters cannot exist.

Also, a lot of your "pronouns" would probably be classed as demonstratives or determiners.

The only other problem I noticed in your description is the alphabet. It looks cool, but would be a nightmare to read/write. The symbols, like those for A and E, are way too similar. A single tiny line left out would leave them looking the same, because the elevation would be hardly noticeable written on paper. I would go back and change a few of the more identical symbols, and make the later ones take fewer strokes.

Other than those, it looks great! You obviously put a lot of thought into it, and did your research. It's also typed up very professionally. Keep up the good work!