To provide an AR (Augmented Reality) system, a method, and an AR device that provide users with description or information for unknown words from audio data around an AR device.SOLUTION: An AR system comprises: a step of monitoring ambient audio data to detect utterance in the ambient audio data; a step 1456 of converting the detected utterance to text; a step 1460 of detecting a keyword such as a rare word in the utterance; a step 1468 of reading auxiliary information (for example, definition) related to the rare word from public or private sources; and a step 1472 of displaying the auxiliary information. The AR system translates foreign language utterance and displays text or translation of the speaker's utterance. The AR system displays statistical or other information associated with the utterance.SELECTED DRAWING: Figure 14B
WORD FLOW ANNOTATION