Lusophony is one of the cornerstones of Portuguese foreign policy. A cultural heritage discourse based on the linguistic legacy of colonialism - the common use of Portuguese - underpins this orientation. Nevertheless, the colonial differentiation of immigrants from former colonies occurs in everyday practices in Portugal. In contemporary Portuguese society, language is used as a device in these processes of subject formation.  The territorial border as a mechanism of exclusion of immigrants is often the focus of critical migration studies. In this proposed research, we focus on border practices that are enacted within the territory through processes of raciolinguistic differentiation. These practices reveal the exercise of everyday violence that is legitimised and normalised by the coloniality of power, knowledge, and language. Thus, we discuss how borders are erased in the high politics of the lusophone space, while they are normally performed in the lived experiences of Brazilian immigrants in Portugal.  Supervior: Thaís França (CIES-Iscte)