The UN Educational, Scientific and Cultural Organisation, UNESCO, has warned that at least one out of the world's estimated 6,000 languages disappears every two weeks.
According to the UN cultural agency, at least 43 per cent of the estimated 6,000 languages spoken in the world are endangered.
UNESCO said only a few hundred languages have genuinely been given a place in education systems and the public domain, and less than a hundred are used in the digital world.
Audrey Azoulay, Director-General of UNESCO, said on the occasion of the 2018 International Mother Language Day that "our values, beliefs and identity" are embedded within language.
Pointing out that every two weeks a language disappears, Ms. Azoulay underscored that "promoting multilingualism also helps to stop this programmed extinction."
"Every two weeks, one of the world's languages disappears, along with the human history and cultural heritage that accompanies it," the chief of the UN cultural agency warned.
Ms. Azoulay called for greater efforts to preserve and promote mother languages and indigenous languages, to bolster inclusion, diversity and ultimately, sustainable development.
"A language is far more than a means of communication; it is the very condition of our humanity. Our values, our beliefs and our identity are embedded within it.
"It is through language that we transmit our experiences, our traditions and our knowledge. The diversity of languages reflects the incontestable wealth of our imaginations and ways of life," she added.
The 2018 theme for Mother Language Day is: "Linguistic diversity and multilingualism count for sustainable development."
The UNESCO chief quoted Nelson Mandela as saying: "If you talk to a man in a language he understands, that goes to his head. If you talk to him in his language, that goes to his heart."
Calling the Day an "essential component of the intangible heritage of humanity," Ms. Azoulay underscored UNESCO's long-standing commitment to preserving and vitalising language, defending linguistic diversity and promoting multilingual education.
"This commitment concerns mother languages in particular, which shape millions of developing young minds, and are the indispensable vector for inclusion in the human community, first at the local level, then at the global level," she elaborated.
Ms. Azoulay said UNESCO supports policies, particularly in multilingual countries, which promote mother languages and indigenous languages and recommends using them from the first years of schooling, because children learn best in their mother language.
The UN agency also encourages their use in public spaces and especially on the Internet, where multilingualism should become the rule, she added.
"Everyone, regardless of their first language, should be able to access resources in cyberspace and build online communities of exchange and dialogue," said Ms. Azoulay.
She called access to language resources "one of the major challenges of sustainable development, at the heart of the United Nations 2030 Agenda."
"On the occasion of this international day, UNESCO invites its Member States to celebrate, through a variety of educational and cultural initiatives, the linguistic diversity and multilingualism that make up the living wealth of our world," she concluded.