The chapter seeks to demonstrate the need to preserve indigenous knowledge through the preservation of indigenous languages in Zimbabwe. This is premised on linguistic determinism which states that language precedes thought and determines one's worldview. Therefore, by preserving indigenous languages, which in Zimbabwe have continued to be marginalized, the country would be preserving its intangible heritage and maintaining the diversity of its knowledge base. Activities undertaken to preserve indigenous languages are assessed and suggestions put forward on how library and information science professionals could also take part in preserving the knowledge resources. The chapter is based on a literature review.