Indonesian is a national and unity language for Indonesian people. Every day, Indonesian people use Indonesian as the primary language to communicate with others. In this era of digitalization, the use of the Indonesian language on social media is inseparable. In social media language style, everyone has their way. One of them is using the language mixture while communicating on social media. Indonesian people often mix the Indonesian language with other languages such as local language and foreign language. Based on this situation, this research aims to provide facts and analyze the use of language mixture between the Indonesian language and other languages on social media. The method research is descriptive qualitative with observation through 5 social media platforms such as Facebook, Instagram, Tiktok, Twitter, and Youtube. The results of this research are 50 data from 5 social media platforms that mixed the Indonesian language with other languages. This research has limitations that are, the data observation-only observed 5 social media platforms and got only 50 data of mixed-language.