The aim of this article is to investigate bilingual speech in the International Schools of Prishtina. More particularly, the focus of this article is on examining code-switching among students highly exposed to English with the latter as the medium of instruction at school in naturally-occurring conversations within school settings. Having reviewed a number of competing methods/approaches already proposed for the interpretation of codeswitching, we followed in this article mainly Auer's Conversation Analysis as a primary source for arriving at some interpretations of CS. Driven by daily unsystematic observation, and prior research already undertaken, the hypothesis stated is that Albanian is influenced by English. More specifically, there will be a lot of lexical insertions from English into an otherwise Albanian frame. Moreover, code-switching is mainly discourse-related. The data gathered from students in informal settings suggests that there are well-founded grounds for an affirmative answer. The participants in this study are noticed to be code-switching, even though showing differences in degree. Regarding discourse functions, the findings reveal that code-switching is discourse-related but also participant- or preference-related. The change in code is not only associated with topic shift, but it serves a range of other discourse functions, such as reiteration, change in participant constellation, self-repair, emphasis, etc. Thus, CS displayed to have a number of complexities of functions within the discourse.