asLanguage 
  Returns the attribute cast to PangoAttrLanguage.
This is mainly useful for language bindings.
Return
The attribute as PangoAttrLanguage, or null if it's not a language attribute
Since
1.50
Returns the attribute cast to PangoAttrLanguage.
This is mainly useful for language bindings.
The attribute as PangoAttrLanguage, or null if it's not a language attribute
1.50