Code mixing and code switching are common linguistic phenomena observed in multilingual and bilingual communities where speakers use more than one language during communication. They reflect the dynamic nature of language use and demonstrate how individuals draw upon their complete linguistic repertoire to express ideas effectively. In the context of language learning, these practices play an important role in communication, identity formation, and classroom interaction. Code mixing refers to the blending of elements from two or more languages within a sentence or utterance. It usually involves the insertion of words, phrases, idioms, or expressions from one language into another without changing the grammatical structure of the base language. For example, a speaker may say, "I have completed my homework, but the teacher gave another assignment for tomorrow," while inserting words from another language naturally into the sentence. Code mixing often occurs unconsciously and is widely used in multilingual societies such as India, where speakers regularly combine English with regional languages.