The agency won the business after a pitch process that kicked off in September.
Previously, Rosetta Stone had used agencies on a project basis to handle its UK marketing activity. It had also worked with Turbine/VGS Creative, its US incumbent shop, on some of its pan-European advertising campaigns.
MBA's first work for Rosetta Stone will revolve around its Christmas marketing activity. The campaign will roll out across all of Rosetta Stone's key European markets, and will look to portray the company's products as a fun and enjoyable way for people to learn a new language.
Rosetta Stone is used by a number of schools and business organisations, as well as by individual consumers around the world.