Melanesia, renowned for its linguistic diversity with more than 1,400 languages spoken has experienced a shift in linguistic practices since the launch of social networks in the late 2000s. This digital transformation has affected all the Melanesian archipelagos. The increase in mobile phone usage since the mid-2000s has made social media platforms such as Facebook, Instagram, and X (formerly Twitter) increasingly popular in Melanesia. Language practices on social networks in Melanesia highlight the visibility and vitality of local languages, many of which are considered endangered. The predominance of English and French — languages of the colonial past and still official in the region — has marginalized many local languages. However, social media has allowed these languages to thrive in new written forms, such as text messages and online discussions, demonstrating their adaptability and relevance to the present day This chapter examines how social media in Melanesia is reshaping the sociolinguistic landscape by creating new linguistic norms and behaviours and how it is also reinforcing multilingual practices. By analysing language use on platforms, such as Melanesian Facebook groups, it shed lights on evolving roles and perceptions of local languages in digital spaces, thus contributing to broader reflections on linguistic dynamics in the digital age.