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# CFLocaleCreateLocaleIdentifierFromComponents(_:_:)

Returns a locale identifier consisting of language, script, country or region, variant, and keyword/value pairs derived from a dictionary containing the source information.

```
func CFLocaleCreateLocaleIdentifierFromComponents(_ allocator: CFAllocator!, _ dictionary: CFDictionary!) -> CFLocaleIdentifier!
```

## Parameters

`allocator`

The allocator to use to allocate memory for the new object. Pass `NULL` or kCFAllocatorDefault to use the current default allocator.

`dictionary`

The dictionary to use when creating the locale identifier.

## Return Value

A locale identifier consisting of language, script, country or region, variant, and keyword/value pairs derived from `dictionary`. Returns `NULL` if there was a problem creating the string. Ownership follows the [The Create Rule](https://developer.apple.com/library/archive/documentation/CoreFoundation/Conceptual/CFMemoryMgmt/Concepts/Ownership.html#//apple_ref/doc/uid/20001148-103029).

## Discussion

Reverses the actions of [`CFLocaleCreateComponentsFromLocaleIdentifier(_:_:)`](/documentation/CoreFoundation/CFLocaleCreateComponentsFromLocaleIdentifier(_:_:)), creating a single string from the data in the specified dictionary. For example, the dictionary {`kCFLocaleLanguageCode``=en``,` `kCFLocaleCountryCode``=US``,` `kCFLocaleCalendarIdentifier``=``kCFJapaneseCalendar``}` becomes `"en_US@calendar=japanese"`.

---

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