Occurrence of Zipf's law of transition in the processes of learning the language

The relationship between the development of learning language by infants and Zipf's law is addressed in this study. There are several stages in the development of language learning. The author focuses on the transition from a particular stage to another. For example, when an infant begins to use a new word, there is a transition from coarse-graining to fine-graining in terms of recognizing his/her own environment by words. Before a new word is used, its meaning and/or its indicated matter is outside of the infant's recognition. There is a great gap between the fine-grained world and coarse-graining inside. The transition following Zipf's law is reported.