MongoDB + Laravel fetch value if field exists in array otherwise fetch value from another field in array

Question

I am working with laravel 5.3 and jenssegers-mongodb.

I have following document in MongoDB :

{
    "_id" : ObjectId("590fgfhddfgdfgdfgdg"),
    "name" : {
        "en" : "Meeting",
        "gu" : "બેઠક"
    },
},
{
    "_id" : ObjectId("590fgfhddfgdfgdfgdg"),
    "name" : {
        "en" : "All",
    },
}

I would like to fetch value if (name.gu) is exist, otherwise fetch from (name.en).

Is it possible ?