SP.Language.languageTag property (sp.js)
Gets the language tag for this language.
Applies to: apps for SharePoint | SharePoint Foundation 2013 | SharePoint Server 2013
var value =SP.Language.get_languageTag()
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Gets the language tag for this language.
Applies to: apps for SharePoint | SharePoint Foundation 2013 | SharePoint Server 2013
var value =SP.Language.get_languageTag()