One of these things is not like the others
Please go to the Question #10 post if you haven't had a chance work on this one yet, since the text below contains the solution.
A couple of people on Twitter got this one right. All of the items on the list are languages, but most of them are invented -- deliberately designed languages. The Klingon language was invented by Marc Okrand for the Star Trek films. Esperanto and Volapük were designed as attempts to create a universal language.
The last language on the list is Aramaic, which is much older than the others on the list. It developed naturally, as did most languages. For this reason, Aramaic does not belong. It is not like the others.