A study said mothers across the world speak to their babies in the same way. "Akachan Kotoba" is called " motherese" in English. According to researchers, motherese is a world language and a special form of communication. Motherese helps babies develop their language. A researcher said baby talk is more important than we thought. As the more parents speak to their babies, the more sophisticated the babies' language skill is, parents don't have to be embarrassed to talk in that way "Motherese". I encourage them to do so and also will do so.