Endangered LanguagesBy: Evangelia Adamou Series: The MIT Press Essential Knowledge series A concise, accessible introduction to language endangerment and why it is one of the most urgent challenges of our times. 58% of the worlds languagesor, approximately 4,000 languagesare endangered. When we break this figure down, we realize that roughly ten percent of languages have fewer than ten language keepers. And, if one language stops being used every three months, this means