I believe English is the International language, so it means we already have a common language. And for me it is really needed for all of us to understand each other. If we don't have common language, communication is nonsense all over the world. Bitcoin is for English people only, and we, whose English is not the main language wouldn't be here. We are not acceptable here in bitcoin if we cannot speak in English, or either we can't earn here in bitcoin. Common language which is English is like a medium, a way to reach other people everywhere around the world.