years most of these will become extinct. These figures are often cited as reasons why language revitalization is necessary to preserve linguistic diversity. Culture and identity are also frequently cited reasons for language revitalization, when a language is perceived as a unique "cultural treasure". A community often sees language as a unique part of their culture, connecting them with their ancestors or with the land, making up an essential part of their history and self-image. According to Ghil'ad Zuckermann, "language reclamation will become increasingly relevant as people seek to recover their cultural autonomy, empower their spiritual and intellectual sovereignty, and improve wellbeing. There are various ethical, aesthetic, and utilitarian benefits of language revival—for example, historical justice, diversity, and employability, respectively." Factors that prevent language death Google launched the Endangered Languages Project aimed at helping preserve languages that are at risk of extinction. Its goal is to compile up-to-date information about endangered languages and share the latest research about them. Anthropologist Akira Yamamoto has identified nine factors that he believes will help prevent language death: There must be a dominant culture that favors linguistic diversity The endangered community must possess an ethnic identity that is strong enough to encourage language preservation The creation and promotion of programs that educate students on the endangered language and culture The creation of school programs that are both bilingual and bicultural For native speakers to receive teacher training The endangered speech community must be completely involved There must be language materials created that are easy to use The language must have written materials that encompass new and traditional content The language must be used in new environments and the areas the language is used (both old and new) must be strengthened Dead languages Linguists distinguish between language "death" and the process where a language becomes a "dead language" through normal language change, a linguistic phenomenon analogous to pseudoextinction. This happens when a language in the course of its normal development gradually morphs into something that is then recognized as a separate, different language, leaving the old form with no native speakers. Thus, for example, Old English may be regarded as a "dead language" although it changed and developed into Middle English, Early Modern English and Modern English. Dialects of a language can also die, contributing to the overall language death. For example, the Ainu language is slowly dying: "The UNESCO Atlas of the World's Languages