Rosetta Stone Inc., is a provider of technology-based language learning solutions. The Company develops , markets, and sells language-learning solutions consisting of software, online services, mobile applications and audio practice tools primarily under its Rosetta Stone brand. Rosetta Stone�s teaching method, called as Dynamic Immersion, is designed to use the innate, natural language learning ability that children use to learn their native language. The Company�s courses are based on its interactive technologies and pedagogical content, and utilize a sequencing of images, text and sounds to teach a new language without translation or grammar explanation. As of December 31, 2011, the Company offered its self-study language learning solutions in 30 languages. In June 2011, the Company released levels 4 & 5 for Chinese (Mandarin) and Russian and TOTALe Companion HD on the Apple iPad. In April 2013, it acquired Seattle-based Livemocha.