If provided, this specifies the language model that should be used by the voice recognition system. See Android.Speech.RecognizerIntent.ExtraLanguageModel for more information. If not provided, the default value Android.Speech.RecognizerIntent.LanguageModelFreeForm will be used.

Must be a string value, using '\\;' to escape characters such as '\\n' or '\\uxxxx' for a unicode character.

This may also be a reference to a resource (in the form "@[package:]type:name") or theme attribute (in the form "?[package:][type:]name") containing a value of this type.

[Android Documentation]