The Importance of Using a Real-World Language

When Star Wars does use a real-world language, they find one that is obscure to the audience specifically because they know you won't recognize it. The Australian series Cleverman features creatures called Harry's which come from mythology of several Aboriginal groups and resemble humans except for their thicker body hair or harder fingernails. I think there is an argument to be had as to whether coded cultures can be given the language of the culture they are coded as.