# ClosedSet

A Boolean value that specifies whether the speech is expected to be in a known language, or one of the languages specified by Languages if you have set that parameter. (For a list of supported languages, refer to the Media Server Administration Guide).

When you set this parameter to `false`, Media Server can decide that the language is unknown and return a result with an empty `language` field.

Type: | Boolean
Default: | True
Required: | No
Configuration Section: | TaskName
Example: | `ClosedSet=False`
See Also: | Languages

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