With a schema like this, where the "items" field contains an array of subdocuments with nested translations :

```
{
        "_id" : ObjectId("513740415b51ea0803000001"),
        "items" : [
                {
                        "id" : ObjectId("5137407f5b51ea100f000000"),
                        "title" : {
                                "en" : "Yes",
                                "fr" : "Oui",
                                "es" : "Si"
                        }
                },
                {
                        "id" : ObjectId("5137407f5b51ea100f000003"),
                        "title" : {
                                "en" : "No"
                        }
                }

        ],
}

```

How would you add a translation to a specific item id ?