To mark World Literacy Month, Code and Theory created a campaign for Burger King that highlights the fact that according to the World Literacy Foundation, one out of five people - 20 percent of the global population - can't read or write.

The campaign saw the chain post menus written in gibberish at one of its drive-thru restaurants in the U.S. to show the other approximately 80 percent what it feels like to be illiterate.

The social campaign will also feature Facebook and Instagram posts written in foreign languages that fans can "translate" through Facebook's auto translation tool to reveal messages in English about the power of literacy and education.

The project was commissioned by the Burger King McLamore Foundation, which works globally to help literacy initiatives.