The man teaching 300 million people a new language January 26, 2020 at 04:29PMhttps://https://ift.tt/2NVWSVN Luis von Ahn is the founder and boss of Duolingo, the world's most popular language learning app.

Luis von Ahn is the founder and boss of Duolingo, the world's most popular language learning app.

from BBC News - World https://ift.tt/2GqF6Wp