ESSA is a language learning application that learners can enjoy while learning a new language by creating their own world in virtual space and play using VR / AR. In the VR / AR world of ESSA, it is possible to create your own world with your favorite things. ESSA has various backgrounds to choose from, such as fantasy, space, an ice world, etc. Changing the scene can be done by voice control and the world in virtual space can be changed instantly.You can be add animation and different movements, like walking, dancing and jumping.ESSA has a voice control function that instructs the application to display your favorite items. However, if the pronunciation of the word is incorrect, the item is not displayed. ESSA adopts the native standard voice control mechanism, it only recognizes correct pronunciation. Therefore, you can train yourself to learn more accurate pronunciation while enjoying ESSA.