With the first settlement of the Dutch at the southern tip of Africa in the mid-17th century, a unique language development occurred. For decades Hugo Schuchardt dealt with the development of Creole languages and led in an intensive correspondence with linguists and missionaries all over the world. The present work deals with one aspect of this work from the history of the Afrikaans language. Schuchardt was the first who coined the term of the semi creolisation in the 1880s for that. The present work analyses the correspondence with various researchers, mainly Dutch and in this context also the hitherto unedited material to the Afrikaans in the literary estate of Schuchardt. Besides, there is a selection of contemporary linguistic review of the Cape Dutch.