Which AI language innovation dramatically improved retail personalization algorithms for multilingual product recommendations in 2018?

Natural Language Processing (NLP) has transformed how brands interact with consumers across multiple languages. From translation services to sentiment analysis, language technologies have become critical tools for global retail strategies. This trivia tests your knowledge about a significant innovation that changed how language barriers are addressed in retail personalization algorithms.

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BERT (Bidirectional Encoder Representations from Transformers)
Word2Vec embedding framework
GPT-1 (Generative Pre-trained Transformer)
ELMo (Embeddings from Language Models)