International Mother Language Day was proclaimed by the General Conference of the United Nations Educational, Scientific and Cultural Organization (UNESCO) in November 1999 (30C/62). The UN General Assembly welcomed the proclamation of the day in its resolution A/RES/56/262 of 2002.
On 16 May 2007 the United Nations General Assembly in its resolution A/RES/61/266 called upon Member States "to promote the preservation and protection of all languages used by peoples of the world". By the same resolution, the General Assembly proclaimed 2008 as the International Year of Languages, to promote unity in diversity and international understanding, through multilingualism and multiculturalism and named the United Nations Educational, Scientific and Cultural Organization to serve as the lead agency for the Year.
This initiative not only increased awareness of language issues, but also mobilized partners and resources for supporting the implementation of strategies and policies in favour of language diversity and multilingualism in all parts of the world
The International Year of Languages came at a time when linguistic diversity was increasingly threatened. Language is fundamental to communication of all kinds, and it is communication that makes change and development possible in human society. Using — or not using — certain languages today can open a door, or close it, for large segments of society in many parts of the world.
Today there is growing awareness that languages play a vital role in development, in ensuring cultural diversity and intercultural dialogue, but also in strengthening co-operation and attaining quality education for all, in building inclusive knowledge societies and preserving cultural heritage, and in mobilizing political will for applying the benefits of science and technology to sustainable development.