Ifd:IfdLanguage

The IfdLanguage class is the class representing xtdLanguage entity from ISO 12006-3.

Class attributes:
 * guid - Globally unique id for the language
 * name_in_english - Name in English for the language, e.g. "New Norwegian"
 * name_in_self - Name in self in mixed case. e.g. "Norsk Nynorsk"
 * language_code - LANGUAGE-COUNTRY, e.g. "nn-NO", "en-GB", "ja-JA" (http://en.wikipedia.org/wiki/List_of_ISO_639-1_codes) and ISO 3166-1 alpha-2 (http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2)