M. Tech. Language Practice / This case study investigated the Afrikaans communication of Grade 10 Afrikaans home language pupils from a dual-medium Free State high school. The participants on whom this study focusses were therefore constantly exposed to an alteration between English and Afrikaans, and the researcher believed their communication would be filled with English code-switched words. It was speculated that these pupils would code-switch often due to the fact that the communication in the school constantly moved between Afrikaans and English. The researcher set out to determine (1) in what way and how often the English code-switching used by these pupils affected the spoken meaning of their communication. She also wanted to know (2) which type of English code-switched words were used most frequently and (3) if these words occurred mostly on intra-sentential or extra-sentential level. Another aim of the study was to (4) establish what aspects of these pupils' spoken Afrikaans were affected by English code-switching and how many times they were affected.