L'institut multilingue Guerrilla(Institute LMG) is a foreign language academy based in Seoul. Reading is prohibited until the ready-to-be speakers come to naturally understand the rhythm of the new language. 

The only permitted method to acquire a new language is: 

enunciate louder and clearer with one's own voice.
With diverse backgrounds interwoven, focused on interaction with each other,

not being obsessed with score but achieving easily, they can move further and smoother.