What I have to say is completely unrelated to the writing, acting, or production value of the movie. All of which I enjoyed. But as a connoisseur of writing systems, I feel as though I should at least give my views on this one aspect of what was, in fact, a great movie.
David Peterson has already covered the fact that the real world language Xhosa is used for Wakanda. So I will leave that alone, except to say that Xhosa has clicks and other features that many languages lack.
“Wakandan is an alphabet designed by production designer, Hannah Beachler, for use in the 2018 film Black Panther. It is based on Nsibidi, a system of symbols used in southeastern Nigeria between about 400 and 1400 AD. In the film the script is used to transliterate English text in the credits and other on-screen text. Other symbols that appear on clothes, wall hangings, and other elements in the film, were inspired by Nsibidi, cave drawings and graffiti in Los Angeles.”
So, the geography is all wrong. Based on the Marvel Wiki’s map, and the earliest mention of Wakanda’s location, it’s toward the East and centrally situated between north and south. Relatively far from Nigeria where the Nsibidi script originates.
Now, to the style of the script. I realize the aesthetics for this movie were kept broad, in a sort of Pan-African style, but the entry here talks about “Nsibidi, a system of symbols used in southeastern Nigeria”, which has a modern alphabet and expanded symbols which are sometimes still used. The Xhosa language, spoken in the film has 10 vowels and over 60 consonants. This means that the simple 26 letter cipher-bet used is wholly insufficient. Aesthetically, the script created for the film does not exactly resemble the actual Nsibidi system, never mind the fact that the Nsibidi system is an ideography. By comparison, if I made a fictional Dragon character from a region somewhere in Southeast China, and had them use something that resembles the Tibetan alphabet…that might be as bad as this.
It’s cases such as these that I wish people would simply say that they made something they thought looked good for the project, or matched the aesthetic they were hoping for, rather than loosely tying it to something so different in so many ways. The script isn’t even appealing aesthetically. It’s far too block-ish to fit the overall style of the film, and whoever thought it needed upper and lower case letters needs to spend a day reading about how rare those are in natural writing.