Which linguistic technique did the language software company Duolingo use to create its name, combining elements that communicate its core product offering?

The language used in product naming and branding can make or break market success. Linguistic innovations have led to some of the most memorable brand names in history, creating words that eventually entered our everyday vocabulary. This poll tests your knowledge about how language science has influenced iconic product naming strategies and innovations that transformed industries through strategic linguistic choices.

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Portmanteau: combining 'duo' (meaning 'two') with a shortened form of 'linguistics'
Onomatopoeia: creating a word that phonetically imitates the sound of language learning
Back-formation: deriving 'duolingo' from the longer term 'dual language education'
Eponym: naming after founders Duo and Lingo Martinez, pioneering computational linguists