The strength is that the information of the book applies not only to teaching and learning English as is traditionally the case, but to other languages which are taught in many countries in addition to English. This makes the volume very important practically. Dealing with different languages, including languages as different as Dutch, Spanish, Scottish and Italian, rather than only English, it is of value to many places in the world. The collection deepens the topic, focusing on how speakers perceive the closeness between languages.