Uses of the Function Language. The Functions of languages function are used in different context of situations. We use the language function based on the context of situation, such as where, when, and whom. We express it means when using the language function we should know the formality and politeness of the expression. So we should know the formal and informal, polite and impolite, and also the neutral context. The expression and the examples of formal and informal, polite and impolite and neutral can be seen below:
