

Yes, language matters and they used it correctly here. As an intransitive verb it means that someone is not detectable. As a transitive verb it means that someone else made them disappear, which usually refers to being abducted, usually by an official group like an arm of the government.
It has been used that way for decades to indicate when a governement kidnaps citizens to detain or kill them in secret.
For future reference, it’s ducats.
Ducat was a “trade coin”(not usually a legal/single state currency) that started in the late 1200s Italy, and was still used by Austra in the early 1900s.