This paper looked into the mental processes in early childhood's language acquisition. The way children acquire their language inherent with specific pattern based on their age and systematic nature. data anlysis based on psycholinguisticsapproach relate with morphological and syntactic acquisition for early childhood.

Slang is an innovation of language change created by a group of people in highlighting their group. Speakers build a cohesive identity and a separate social class that becomes a culture in society. The purpose of this study was to gain an in-depth understanding of slang as a manifestation of a person's social-cultural identity in the community group in the film Step Up 2 The Street. The method used is descriptive qualitative. Data was collected using documentation. The data is in the form of utterances in the dialogue of film players that contain slang words. Data analysis through the stages of data reduction, presentation and concluding. The results of the study conclude that the use of slang in the film Step Up 2 The Street shows the diversity of social and cultural identities in people's lives. The group of slang users refers to the context of similarity in the race, kinship or group, level of intimacy, group localization, and social culture that characterizes each group.