3-letter initials for subtitle languages

[drpaulng]

Does anybody know the proper "3-letter initials" for subtitle languages?

e.g.
eng (English)
chi (Chinese)
...
xxx (Cantonese) ???

[Pl4yit]

This is the info I found in a text file on one of my recent blu-ray discs. Hope this helps ;)

# Note: the official list of language code values (ISO 639-2/T) can be found at
# http://www.loc.gov/standards/iso639-2/php/code_list.php
# Be careful to use the terminology code not the bibliographic code.
# e.g. For Chinese use "zho" not "chi", for French use "fra" not "fre", for Dutch use "nld" not "dut"

[drpaulng]

Thank you so much. This is very important when author AVCHD/Bluray with subtitles.