The book primarily tackles and occurrence of malapropism and codeswitching linguistic phenomena in the context of applied linguistics, sociolinguistics, culture and history. The noted relevance of codeswitching and malapropism has also been delineated to better establish a complete grasp of the preceding phenomena. In truth, the chief purpose of the creation of the book is to help language teachers with English as second language during teaching-learning process. The conclusion and discussion parts of the book highlights some tips for L2 teachers on how are they going to handle their learners. By the same token, the book also reviews some principles of Second Language Acquisition (SLA) to aid educators in their pedagogical practice.