To establish the necessary language in the application, open the side Menu and go to the "Settings".

In the settings "Language" you can choose one of 8 languages, including English, or establish the language by the default. The language by default is the language of your phone (if it's one of 8 supported languages).

You may need to restart the application in order to change the language. For this purpose, swipe the application away from the dispatcher of the tasks, then start CoinKeeper again.