Include/exclude specific fields

[Itay_Bittan]

My index's documents looks like that:

{
        "sku": "1234567890",
        "name": "my_name",
        "lng:en_AE:name": "my_name_in_AE",
        "lng:en_AE:price": 10.99,
        "lng:en_BH:name": "my_name_in_BH",
        "lng:en_BH:price": 9.99,
        "lng:en_QA:name": "my_name_in_QA",
        "lng:en_QA:price": 8.99,
    }

There are two "types" of fields:

1. general/global - like "sku", "name".
2. language based fields, start with perfix: lng:xx_YY:* - like "lng:en_AE:name".

A user can add his own fields, either general/global ones or language specific.

When we search for the documents, we want to get all general/global fields and one specific language fields:

{
  "_source": {
        "includes": [
          "lng:en_AE:*",
          "*"
        ],
    "excludes": [
        "lng:*"
    ]
  }
}

The query about doesn't work but my intent was the get exclude all languages different than en_AE. I don't know all lng possibilities in advance and I can't change the schema, is there a way to achieve that?
I would like to get that as a response:

{
        "sku": "1234567890",
        "name": "my_name",
        "lng:en_AE:name": "my_name_in_AE",
        "lng:en_AE:price": 10.99,
    }