Language has always played a significant role in the colonization of peoples as an instrument of subjugation and homogenization. It has been used to control nondominant groups, including Indigenous peoples, often leading to their exclusion or assimilation. Many Indigenous groups, however, use language as a tool to connect the members of their community, to assert their group identity, and to preserve their culture. Thus, language has been used both as a means of oppression and as a mobilizer of Indigenous groups in their struggles for national recognition. Recognizing the significance of language in the identity and culture of Indigenous peoples, this article analyses how language rights can be viewed as an aspect of the right to self-determination of these groups.