Which tech company's 2019 advertising campaign featured linguists from 5 continents collaborating to improve accent recognition in their voice assistant technology?

Voice recognition technology has revolutionized how we interact with products and services. Behind these innovations are fascinating linguistic principles and breakthroughs in natural language processing. This poll tests your knowledge about a groundbreaking advertising campaign that highlighted linguistic innovation in product development.

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Google with their 'Voices of the World' initiative
Amazon with their 'Echo Understands' campaign
Apple with their 'Siri Speaks Your Language' series
Microsoft with their 'Global Cortana Project' advertisements