The study sought to investigate how the symbiotic relationship between amaXhosa and amaNdebele impacted on IsiXhosa language and amaXhosa culture in Mbembesi area in Zimbabwe. The study was conducted where two ethnic groups of amaXhosa and amaNdebele coexist. Language policies in the past have disadvantaged amaXhosa by treating the language as a minority language which led to its marginalisation at school and in public life. Dynamic Social Impact Theory was used to explain the concept of the evolution of language. Language contact, language change, and bilingualism are the main terms that were discussed in relation to what happened to the two languages of study. The case study was descriptive in nature. The participants were purposefully selected according to what the researcher desired to achieve. The data were collected through interviews with heads of schools in Mbembesi, teachers, elders and youths of the community. Document analysis was also employed when the Indigenous Languages syllabus and teachers’ schemes were observed. The pupils were given a topic on which to write a short composition in IsiXhosa and IsiNdebele to ascertain if indeed IsiNdebele had impacted on IsiXhosa. A comparison between IsiXhosa of Mbembesi and that of South Africa was made as a way of verifying if there has been a change from the original IsiXhosa that is spoken in South Africa. The two ethnic groups’ cultural activities were also studied as a way of investigating the level of impact in their way of life. After administering the research instruments, the findings revealed that there is a level of impact on IsiXhosa language and amaXhosa culture through their contact with amaNdebele. The terminology in the two languages has overlapped as well as their cultural lives. The Zimbabwean 2013 Constitution has tried to raise the status of IsiXhosa by making it officially recognised but it seems to be still functioning at community level as before. IsiXhosa is still not learned at school although it was introduced in 2013 in the two pilot schools but which discontinued in 2016 reverting to IsiNdebele citing lack of teaching and learning materials. The recommendations from the study include: that the teachers should be trained in IsiXhosa at institutions of higher learning; that amaXhosa educated personnel should spear-head the writing of teaching and learning materials and that the language should be used in public life so that its speakers maintain their identity. / Linguistics and Modern Languages / Ph. D. (Languages, Linguistics and Literature)