There are two primary languages of all of the realms. The language Astraian is equivalent to a language that you may know very well: English! The humans created this language within the first few years they were born as a species.
The other primary language of the remaining realms speak Arelin. Of course, all of the realms know and learn Astraian as well. The more the realms are explored, the more privileges you humans get. You should be able to gain access to the Arelin dictionary soon.
I guess you can only hope.