 The human protagonist, Jarvis, cannot grasp even a faint light of this language.The central alien, Tweel, is able to grasp various words in the human's language, English, such as "breet" (supposed to be "breathe") to designate living creatures, "no breet" for inanimate objects, "rock" to indicate silicon-based life forms, "one one two" to indicate a rudimentary level of intelligence, and "two two four" for a higher level of intelligence.With these smatterings of human language, Tweel puts forward advanced ideas and concepts, thus proving he is intelligent.