RESTful Multi-Language Paths

I created a multi-language site based on 8.0-alpha11. This site is configured so English is displayed when using the 'www' subdomain. Spanish is displayed when using the "es" subdomain. The following URLs are both working as a result:

http://www.RayStedman.info/node/1 -- returns English HTML

http://es.RayStedman.info/node/1 -- returns Spanish HTML

My goal is to return JSON using a RESTful GET for the two URLs above. I enabled modules, configured permissions and adjusted rest.settings. I then issued a GET request with an "Accept: application/json" header for the English URL. I received JSON content in English as expected. I then issued a GET with the Spanish URL and the same header. I received JSON content in English as well. I expected to receive JSON content in Spanish using the Spanish URL.

Please note both of these URLs access a custom content type where most of the fields are translatable. The English node was created first and then translated into Spanish.