Magia Sexualis appeared in French in 1931 under Randolph's name, more than fifty years after his death, edited by Maria de Naglowska. It is presented as a translation of a Randolph manuscript, and no such manuscript has been produced.
What the book actually contains is a compilation. Parts of it correspond to Randolph's known positions and are plausibly derived from his writing; other parts introduce material he is not known to have taught, including practices and framings that belong to Naglowska's own system, and the whole is arranged in a way that reads as a single coherent treatise in a manner Randolph never achieved.
Naglowska was a substantial figure in her own right, running a Paris circle with a doctrine of her own centred on a third term reconciling the masculine and feminine principles, and the honest description of this book is that it is a work of hers built on his.
That matters because the French text is how Randolph reached twentieth century European occultism. A great deal of what is attributed to him in that lineage comes from here rather than from anything he wrote, and the atlas records the authorship problem on this page rather than repeating the attribution.