# Custom region/language

Batch allows you to set a custom region or a custom language that will override the value detected by the SDK. By default, Batch collects the language and the country of your users' devices.

Setting a custom region/language is useful if:

* You don't want to use the values detected by Batch.
* Your users can choose their own language or region for localization purposes.

![Custom locale](/files/JfgYJWbzQUl3TlW0U7Of)

**Writing custom region/language**

{% tabs %}
{% tab title="Swift" %}

```swift
BatchProfile.editor { editor in
    try? editor.setLanguage("en") // Language must be 2 chars, lowercase, ISO 639 formatted
    try? editor.setRegion("US") // Region must be 2 chars, uppercase, ISO 3166 formatted
    // If you prefer to use BatchProfile.editor() with local variable instead of usiong a closure,
    // remember to use editor.save() afterwards so that the changes are taken into account.
}
```

{% endtab %}

{% tab title="Objective-C" %}

```objectivec
[BatchProfile editWithBlock:^(BatchProfileEditor * _Nonnull editor) {
    [editor setRegion:@"en" error:nil]; // Language must be 2 chars, lowercase, ISO 639 formatted
    [editor setRegion:@"US" error: nil]; // Region must be 2 chars, uppercase, ISO 3166 formatted
    // If you prefer to use [BatchProfile editor] instead of `editWithBlock`,
    // remember to use [editor save] afterwards so that the changes are taken into account.
}];
```

{% endtab %}
{% endtabs %}

{% hint style="info" %}
If you call `editor` method before `startWithAPIKey` it will return nil. You should always call it after you started the SDK, and check nullity to be safe.
{% endhint %}

**Reading custom region/language**

Keep in mind that the data returned is only about your installation and not your Profile since it may be updated from another source.

{% tabs %}
{% tab title="Swift" %}

```swift
// This is how you retrieve your custom values. Values are nil by default.
let language = BatchUser.language()
let region = BatchUser.region()
```

{% endtab %}

{% tab title="Objective-C" %}

```objectivec
// This is how you retrieve your custom values. Values are nil by default.
NSString *language = [BatchUser language];
NSString *region = [BatchUser region];
```

{% endtab %}
{% endtabs %}


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