<!--
{
  "availability" : [
    "iOS: 13.0.0 - 15.0.0",
    "iPadOS: 13.0.0 - 15.0.0",
    "macCatalyst: 13.1.0 - 15.0.0",
    "macOS: 10.15.0 - 12.0.0",
    "tvOS: 13.0.0 - 15.0.0",
    "visionOS: 1.0.0 - 1.0.0"
  ],
  "documentType" : "symbol",
  "framework" : "Vision",
  "identifier" : "/documentation/Vision/VNRecognizeTextRequest/supportedRecognitionLanguages(for:revision:)",
  "metadataVersion" : "0.1.0",
  "role" : "Type Method",
  "symbol" : {
    "kind" : "Type Method",
    "modules" : [
      "Vision"
    ],
    "preciseIdentifier" : "c:objc(cs)VNRecognizeTextRequest(cm)supportedRecognitionLanguagesForTextRecognitionLevel:revision:error:"
  },
  "title" : "supportedRecognitionLanguages(for:revision:)"
}
-->

# supportedRecognitionLanguages(for:revision:)

Requests a list of languages that the specified revision recognizes.

```
class func supportedRecognitionLanguages(for recognitionLevel: VNRequestTextRecognitionLevel, revision requestRevision: Int) throws -> [String]
```

## Parameters

`recognitionLevel`

The level of recognition to prioritize. Set this level to [`VNRequestTextRecognitionLevel.fast`](/documentation/Vision/VNRequestTextRecognitionLevel/fast)to prioritize speed over accuracy, and to [`VNRequestTextRecognitionLevel.accurate`](/documentation/Vision/VNRequestTextRecognitionLevel/accurate) to prioritize accuracy at the expense of speed.

`requestRevision`

The revision of the text recognition algorithm for the Vision framework to use.

## Return Value

An array of supported languages, listed as ISO language codes.

## Discussion

A language supported in one recognition level may not be available in another recognition level.

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)