Which linguistic phenomenon has been identified as the biggest challenge for voice commerce systems when serving multilingual customers aged 50+?

Voice-based shopping is transforming retail, with language technology becoming a critical factor in consumer behavior. Different demographic groups interact with voice commerce systems in unique ways, creating both opportunities and challenges for retailers. How well do you understand the linguistic patterns behind this retail revolution? Test your knowledge about the intersection of language, demographics, and retail voice commerce with this trivia question!

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Code-switching (alternating between two or more languages within a conversation)
Formal register preference (using more formal language with AI than with human representatives)
Dialect-specific vocabulary (using regional terms that aren't in standard recognition databases)
Prosodic variations (changes in rhythm, stress, and intonation that confuse voice recognition)