For further info, if anyone is interested, Stephen Bax claimed a decade ago to partially decode the manuscript; here’s a video with his reasoning, as well as the paper he released. Sadly Bax passed away in 2017 (may he rest in peace), so the work was left incomplete.
SciShow just did a decent video on this yesterday.
https://www.youtube.com/watch?v=K0wVcFXNXLw