Ethnologue is a comprehensive reference work that catalogs all of the world's known living languages. It provides detailed information about each language, including its number of speakers, geographic distribution, and language family. The database is widely used by linguists, researchers, and educators to study language diversity and preservation. Published by SIL International, Ethnologue is updated regularly to reflect changes in language status and demographics. It serves as an essential resource for understanding the complexities of human communication and the cultural significance of languages around the globe.