Language plays an important role in the social communication of elementary school students and is influenced by the relationship between language, society, and the environment within an ecological language perspective. This study aims to examine the use of language in students’ social communication as well as the factors that influence it. This research employs a qualitative approach with a descriptive design conducted in an elementary school with diverse social backgrounds. Data were collected through observation, interviews, and documentation, and then analyzed using an interactive analysis model. The findings show that students use formal Indonesian in learning contexts, while in non-formal interactions they tend to use regional languages, mixed languages, and slang influenced by family environment, peers, and digital media. Students also demonstrate the ability to adjust their language use according to the communication context. These findings emphasize that students’ language use is dynamic and contextual as part of the language ecosystem. Therefore, language learning in elementary schools needs to be conducted in a contextual and adaptive manner by considering linguistic diversity as a potential to support students’ communication skills.
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