---
title: "registerLanguage(_:byVendor:)"
framework: foundation
role: symbol
role_heading: Instance Method
path: "foundation/nsspellserver/registerlanguage(_:byvendor:)"
---

# registerLanguage(_:byVendor:)

Notifies the receiver of a language your spelling checker can check.

## Declaration

```swift
func registerLanguage(_ language: String?, byVendor vendor: String?) -> Bool
```

## Parameters

- `language`: A string specifying the English name of a language on Apple’s list of languages.
- `vendor`: A string that identifies the vendor (to distinguish your spelling checker from those that others may offer for the same language).

## Return Value

Return Value Returns true if the language is registered, false if for some reason it can’t be registered.

## Discussion

Discussion If your spelling checker supports more than one language, it should invoke this method once for each language. Registering a language-vendor combination causes it to appear in the Spelling panel’s pop-up menu of spelling checkers.

## See Also

### Providing Spelling Services

- [run()](foundation/nsspellserver/run().md)