Leo Caesius
Banned
That's a very tough question. It depends on how isolated the language is and whether it is being passed down to the next generation.What kind of numbers would you say a language has to get down to before it is in irreparable decline?
For instance, the rule of thumb is 10,000 or fewer speakers, but if those 10,000 are out in the middle of nowhere, without TV, radio, or compulsory education in the national language, then short of being decimated the language will continue to thrive. On the other hand, if you have a minor Chinese dialect (say a couple hundred thousand speakers or even a million or more) spoken in a highly developed region surrounded and intermixed with tens or hundreds of millions of Mandarin speakers, subject to TV, radio, compulsory education, and military conscription, all requiring knowledge of Mandarin, then chances are that the dialect will die out in a few generations if not faster.