This is what I have in my locales
eXiStEnCe:~# cat /etc/locale.gen
en_US ISO-8859-1
en_GB ISO-8859-1
en_GB.ISO-8859-15 ISO-8859-15
en_GB.UTF-8 UTF-8
en_US.UTF-8 UTF-8
ja_JP.EUC-JP EUC-JP
ja_JP.UTF-8 UTF-8
ko_KR.EUC-KR EUC-KR
ko_KR.UTF-8 UTF-8
th_TH TIS-620
th_TH.UTF-8 UTF-8
zh_CN GB2312
zh_CN.GB18030 GB18030
zh_CN.GBK GBK
zh_CN.UTF-8 UTF-8
zh_HK BIG5-HKSCS
zh_HK.UTF-8 UTF-8
zh_SG GB2312
zh_SG.GBK GBK
zh_SG.UTF-8 UTF-8
zh_TW BIG5
zh_TW.EUC-TW EUC-TW
zh_TW.UTF-8 UTF-8
Am not sure what else I have missed.