Which linguistic phenomenon did market researchers specifically avoid when naming the Nissan 'Leaf' electric car for global markets?

Brand naming is a fascinating intersection of linguistics and marketing. Companies invest significant resources into finding the perfect name that resonates across languages and cultures. This trivia question explores how linguistic principles influence the creation of global brand identities and how language experts contribute to market research in the naming process.

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Phonetic symbolism (the sound evoking size or shape)
False cognates (words that sound similar but have different meanings across languages)
Alliteration (repetition of consonant sounds)
Onomatopoeia (words that phonetically imitate the sounds they describe)