The global Boss global is from Guatemala

The BBC's weekly The Boss series profiles different business leaders from around the world. This week it speaks to Luis von Ahn, co-founder and chief executive of language learning app Duolingo.

Fast forward to today, and von Ahn is the co-founder and boss of Pittsburgh-based Duolingo, the world's most popular language-learning app, which has more than 300 million users around the globe, the BBC reports.