Person: Luis van Ahn

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Person: Luis van Ahn

A COMPREHENSIVE SERIES OF ARTICLES ON THIS TOPIC

I told Duolingo I wanted to do the 'Insane' level of Spanish per day

I told Duolingo I wanted to do the 'Insane' level of Spanish per day

My vital signs are showing good numbers, says Colm O’Regan. 

Mon, 29 Jan, 2018