Which NLP feature was FIRST widely adopted by major retailers in their customer service chatbots?

The intersection of linguistics and retail has transformed dramatically with AI language assistants. These tools have revolutionized customer service, personalization, and shopping experiences through natural language processing. But how much do you know about their implementation in retail environments? Test your knowledge about this cutting-edge retail technology that's changing how consumers interact with brands and products through language.

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Sentiment analysis (detecting customer emotions)
Intent recognition (understanding what customers want)
Multilingual translation (serving international customers)
Voice biometrics (identifying customers by speech patterns)