Language plays a crucial role in human thought and culture. It influences what we think, feel and believe. There are approximately 6,000 languages worldwide, with 95% of people speaking just 100 of those, and linguists are concerned about the languages threatened with disappearance. Language serves seven main functions: instrumental, regulatory, interactional, personal, imaginative, heuristic, and informative. It is unique to humans and acquiring it is critical in early childhood. Language both shapes and reflects the culture of its speakers.