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  "documentType" : "symbol",
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  "title" : "notInstalled"
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-->

# notInstalled

The device doesn’t have the necessary languages downloaded to perform a translation and the
session can’t request the person to download them.

```
static let notInstalled: TranslationError
```

## Discussion

This error is thrown if <doc://com.apple.documentation/documentation/Translation/TranslationSession/canRequestDownloads> is false and either the languages are supported but the person hasn’t approved them or if the person has approved them but the languages haven’t finished downloading.

---

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