Which linguistic technology was FIRST widely adopted by major retailers to enhance their digital customer experience?

The intersection of linguistics and retail has created fascinating innovations in how companies interact with customers. Natural Language Processing (NLP) and language technologies have transformed customer service, inventory management, and the overall shopping experience. This poll tests your knowledge of how language technology has specifically impacted retail digital transformation - an area where linguistics expertise meets business innovation.

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Neural machine translation for multilingual product descriptions (2018)
Basic keyword-based search functionality (1990s)
Voice-activated shopping assistants (2014)
Sentiment analysis for customer review sorting (2010)