Which groundbreaking linguistic innovation in packaging design was first introduced in the 1970s and is now standard practice for global brands?

In the world of linguistics and language marketing, packaging design plays a crucial role in how products are perceived and purchased. Language choices on packaging can significantly influence consumer behavior across different demographics and cultures. This trivia question explores a fascinating linguistic innovation in product packaging that revolutionized how language is used to sell products internationally.

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Iconographic language systems that replace text with universal symbols
Back-translation verification protocols for multilingual packaging
Neural-linguistic programming (NLP) based product descriptions
Sound symbolism product naming based on phonetic appeal across languages