The document discusses code-mixing in language. It begins by providing background on sociolinguistics and defining key terms like language, code, speech community, bilingualism, and code-mixing. It then discusses code-mixing in more depth, describing it as the change between one language to another within the same utterance or text. Some key features of code-mixing are that elements can be mixed on all grammatical levels and obey the rules of the original language. The document examines code-mixing in terms of its linguistic form and social/cultural meanings. Overall, the document provides an overview of code-mixing and its analysis in language.