This study is done due to the writer’s interest to observe and to imitate children’s language. It leads the writer to be closed with them, then it is found that the production of children language is different each other. In fact, there are children at the age of 18 months (1.5 years old) who can utter many words. However, this ability does not develop well until the age of 24 months (2 years old). Besides, there are children who fluently utter words and understand the meaning at the age of 20 months. On the other hand, there are 5 years old children who are not able to utter and to understand words. For this matter, the writer intends to observe how these children have different improvement even though they live in the same culture and environment. Basically, parents take roles in children’s growth and ability to comprehend language since they are always with their children. Thus, it is possible for a child not to be able to speak Javanese even though he lives in Java if his family speaks in Bahasa. It means that semantic aspect is as necessary as phonology, morphology, and syntactic.
This study is aimed at discussing language acquisition on a child, named Aim until the age of 24 month the (2 years old). The writer observes his language development since he was born. Some points to observe are: 1) phonology aspect to observe the formation of children’s speech organ 2) semantic aspect to observe children understanding toward the used language 3) children’s speech development because itshould not be complete before the age of 36 months (3 years old).
The technic used in this study is visual and audio involvement, done for 24 months by using qualitative descriptive method. The result of the study shows that Aim is able to utter 11 vocal sound, 3 diphtong sound and 20 consonant sounds. Aim is also able to understand more than 110 words