In addition, we are looking for input with regard to priority. It is felt that this type of markup is important, and the debate we had with ourselves was between whether it would be a priority one or a priority two. In the current guidelines, they are listed as priority two for the following reasons. Priority one is reserved for those things that if they are not done, the user cannot access the information on the page even with extra effort. Priority two is designed for situations where it is hard for the user to access a page if it is not done.
Lets look at the Whole page in and unexpected language.
An individual trying to access a page would find that the content that was presented to them in either speech or Braille was incomprehensible to them. Lets assume that this person is not a liguist and knows only two or maybe three languages. If they hit a page that comes out in Braille in a form they cannot make sense of it, they could try one or two languages that they were familiar with and see if the page was comprehensible in those languages. If not then, like all of us, they would probably give up on the page. Thus if it were in a language they could understand, it would be accessible but take extra effort to find out.