The Day the Earth Stood Still
"Klaatu barada nikto" is arguably one of the most famous snippets of conlang in any science fiction film. The phrase appeared in the 1951 movie The Day the Earth Stood Still and has become firmly engrained in popular culture, even been called "the most famous phrase ever spoken by an extraterrestrial".
The image at the left is Klaatu himself and appears here.
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