For Millions of Immigrants, a Common Language: WhatsApp

Messaging app Whatsapp has quietly become a mainstay of immigrant life. More than a billion people regularly use WhatsApp, which lets users send text messages and make phone calls free over the internet. The app is particularly popular in India, where it has more than 160 million users, as well as in Europe, South America and Africa.

Because it’s free, has a relatively good record on privacy and security, and is popular in so many parts of the world, WhatsApp has cultivated an unusual audience: It has become the lingua franca among people who, whether by choice or by force, have left their homes for the unknown.