Welsh language expert David Crystal said the Internet could forestall the dismal fate of about half of the world's 6,500 languages, which are doomed to extinction by the end of the 21st century at a rate of about two language deaths a month.

"The Internet offers endangered languages a chance to have a public voice in a way that would not have been possible before," said Crystal, who has written over 50 books on language including ‘The Cambridge Encyclopaedia of Language’.

Languages at risk of extinction are appearing on blogs, instant messaging, chat rooms, video site www.youtube.com and social networking site www.myspace.com, and their presence in the virtual world curries favour with youngsters who speak them.

"It doesn't matter how much activism you engage in on behalf of a language if you don't attract the teenagers, the parents of the next generation of children," Crystal, who was raised speaking English and Welsh, said.

"And what turns teenagers on more than the Internet these days? If you can get a language out there, the youngsters are much more likely to think it's cool."

Online free encyclopaedia www.wikipedia.org, written and built by volunteers, has entries in dozens of endangered languages, from native American Cherokee to the Austronesian language Tetum, spoken by less than a million people in East Timor, to the Maori language of New Zealand.

Tens of Welsh chat rooms exist for its 600,000 speakers--just over 20 per cent of Wales--where young people look for the best pubs in town, or hunt for potential dates.

Crystal said there are 50-60 languages in the world which have one last speaker, and around 2,000 have never been written.

"If these languages die, they are gone forever. This is a huge intellectual loss to humanity. The Internet is very important in this respect," he said.

Money is usually required to go virtual however, and this is problematic for African and indigenous South American languages, where resources are low and governments favour dominant languages Spanish, French and English.

Native American languages, especially Navajo, are fortunate to have many virtual communities on the Internet as most are funded by the lucrative casinos the Navajos run, Crystal said.

"To put it into perspective only two to four percent of the world's botanical and zoological species are in serious danger, whereas it's 50 per cent of languages. The language crisis hasn't attracted the same degree of public awareness".