I am using version 2.6.1. I am trying to create a text index and I'm getting error:

```
{
    "connectionId" : 4932,
    "err" : "language override unsupported: en-US",
    "code" : 17262,
    "n" : 0,
    "ok" : 1
}

```

The documents being searched have a "language" field that has a value of "en-US", but it is not used to override the language in a text search. I tried to create the text index to specify a field that doesn't exist ("lang"); however, I get the same error.
I was able to create the index just fine on version 2.6.0. Is there a way to create the text index and ignore the language\_override field?

Here is the working command I used on 2.6.0 (doesn't work on 2.6.1):

```
db.collection.ensureIndex({ title: "text" }, { name: "TextIndex" })

```

Here is the command I tried on 2.6.1 to specify another language\_override field that does not exist:

```
db.collection.ensureIndex({ title: "text" }, { name: "TextIndex" }, { language_override: "lang" })

```

Thanks in advance!