This word list was created using Viet39K.txt found in the vn_words.zip package which can be downloaded from http://www.informatik.uni-leipzig.de/~duc/software/misc/wordlist.html On that page Ho Ngoc Duc included the notice: The word list is distributed under GNU General Public License. If you modify it, please send me the modifications. The vi_VN.aff rules were improved by Ivan Garcia - capiscuas@gmail.com (Sept 2007) More Info here: http://code.google.com/p/hunspell-spellcheck-vi/