The InternetRequest for Comment document about Tags for the Identification of Languages (ftp://ftp.rfc-editor.org/in-notes/rfc3066.txt). It provides a way to register extensions of codes for language names in ISO 639. The current reviewer of new tags and maintainer of the registry is Michael Everson (http://www.evertype.com/standards/iso639/iana-lang-assignments). An alternative for language codes is the Ethnologue.
... town is 98.12% White, 0.00% African American, 0.06% Native American, 0.58% Asian, 0.00% Pacific Islander, 0.26% from other races, and 0.97% from two or more races. 1.88% ...