What does "Klaatu birata nikto" (from Army of Darkness) actually mean and what is its origin?

I remember hearing this in “The Day the Earth Stood Still” as well as this movie and I was always curious what the word actually mean. I mean are they Latin or just fake words made up in a Sci-Fi movie. I also want to know if these words were used in anything else besides these movies, such as other movies or in... show more I remember hearing this in “The Day the Earth Stood Still” as well as this movie and I was always curious what the word actually mean. I mean are they Latin or just fake words made up in a Sci-Fi movie. I also want to know if these words were used in anything else besides these movies, such as other movies or in recorded historical events.
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