What do you mean by additional recognition of sign languages? You do know that ASL isn't recognised in USA, right?
"They" as you described is the US government.
Um. "US has no official language"? Are you really serious? It's... English...the language is the law of the land... and franca lingua of the world, if you think about it.
By recognition, I meant an acknowledge of the acceptance. Sure, there are several documents in Spanish, but it doesn't mean they endorse them. They are just an "instructions" into assimilation. Basically it all bottoms down to the "acceptance" status into the government as a form of "royal" rights, thus granting more acceptance among government officials.
If you are still confused, then I apologise- I feel like too 'Europeanised' since I came here. My relatives even asked if I lost the concept of what it mean to be an American lately
But uhhh... I did not know that some Canadians use ASL. Interesting.
ON TECHNICAL: About interpreters- as I believe, the technical issue of this is that they cannot interpret into any language during the Court presence, except for the client's case as well as the declaration to all audience, right?? Therefore, deaf person would not have known what is going on in the hearings of others than his. I'm not sure if you've interpreted for Court, but if you have, surely you have known this definition of law... Which makes sense actually to me in a way.
Sorry, I've had my 14th beer, along with couple of wine glasses, and ehh. Any further questions? I think I will respond to this when I clear up when I wake up.