The study deals with the linguistic acculturation at the end of the 17th century of the French Protestant Huguenots, who also sought refuge in Brandenburg. The study focuses on the reconstruction of the linguistic integration of these migrants, who in the course of time gave up their native French language and went over to German. An analysis of the linguistic situation in three different Huguenot colonies shows that the processes of language change differed widely, depending on the place and context.