This document provides an introduction to language planning, defining it as the efforts to solve language problems and change linguistic behavior at the national level. It outlines four main types of language planning: corpus planning which deals with the structure of language; status planning which changes a language's role and functions in society; prestige planning which promotes a language's image and usage; and acquisition planning which spreads a language through education. The conclusion states that language planning is essential for shaping and defining a nation's identity.