Category:Redirects from ISO 639

Please add a parameter to the template for correct sorting. ISO 639:deu, for example, contains the following:
 * 1) REDIRECT German language

Some pages of this format will not be redirects but disambiguation pages between two or more languages. This is especially true of the collective codes of ISO 639-2, e.g. ISO 639:art, and for the ISO 639 macrolanguages, e.g. ISO 639:zho.