I've decoded N'Jobu's final mission letter using the characters listed here:
https://www.omniglot.com/conscripts/wakandan.htm
When Killmoger visits the Ancestral Plane he finds a book including coordinates to wakanda, a letter to his son N'Jadaka, and a final mission statement written in Wakandan which I've attempted to transcribe. There are parts that are very jumbled (no clue who actually wrote it) but it describes a lot of things seen and talked about in the movie which is pretty cool.
Of course I'm sure I've made my mistakes as well with all of the camera blur and parts that can't be seen so feel free to watch and correct me! Here's what I got:
1.We have one last mission to set
2.everything in motion. We need to
3.deliver the vibranium to two war
4.dogs stationed in the French Colony
5.of Quebec, Canada where they will
6.reverse engineer the vibranium. It will
7.become comparable to an atom bomb
8.when the energy it absorbs is
9.redirhield in S. Korea. I've know Jae
10.Owa the proprietor for se directed...
11.their contact will meet us and take
12.us to the proprietor for several ye...
13.it was a long night of poker in S. Korea.
14.He has secured a plane for asll
15.need it. or rather, until the.....
16.need to disappear. I'll...
17.contact in S. Korea after...
18.the border of Wakanda...
(Killmonger's hand is in the way for a lot of the bottom. Lol.)
Then it list coordinates to a location. Maybe the location that Ulysses Klaue set off the bombs at the border? Or maybe a location for them to meet after the mission? Pretty cool that they referenced a lot of the events in the movie though!
If you can decode any of the rest of it, do so!