Name conflict when sideloading models

Consider the following code:

{
   "post":{
      "id":1,
      "title":"Killing Koopas",
      "author":"Super Mario",
      "categories":[
         12,
         41
      ],
      "translations":{
         "en":{
            "title":"Something",
            "content":"A long text"
         },
         "es":{
            "title":"Algo",
            "content":"un texto largo"
         }
      }
   },
   "categories":[
      {
         "id":12,
         "translations":{
            "en":{
               "title":"News",
               "description":"a description"
            },
            "es":{
               "title":"Noticias",
               "description":"una descripción"
            }
         }
      },
      {
         "id":41,
         "translations":{
            "en":{
               "title":"Sport",
               "description":"another description"
            },
            "es":{
               "title":"Sport",
               "description":"otra descripción"
            }
         }
      }
   ]
}

As you can see both "post" and "categories" models have a "translations" field with different sub-fields. This is a simplified version of my real model. How would you map a JSON structure like this one to Ember Data?