Language Code Input standards Mandatory.
All formats Indicates the language of the work.
Lang represents the language of the item. The item is the principal work, including legends, accompanying text, singing, or spoken text, and excluding preface, introduction, foreword, and appendixes. If the item is multilingual or a translation, use multiple language codes. Use the predominant language code for a multilingual item that has two to six languages. If predominance cannot be determined, use the code that is alphabetically first.