Which linguistic capability represents the most recent advancement in multilingual retail chatbots?

Natural Language Processing (NLP) has revolutionized retail chatbots, enabling more human-like interactions with customers. From basic keyword recognition to understanding complex linguistic nuances, retail chatbot technology has made tremendous leaps. This trivia question explores how linguistic features are integrated into modern retail AI systems to enhance customer experience and improve service efficiency across different languages and dialects.

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Sentiment analysis across regional dialects of the same language
Code-switching recognition (handling multiple languages within the same conversation)
Basic translation between major world languages
Recognition of common retail-specific terminology