The Korean and Chinese languages comes with more than 2500 character alphabets so it is not practical to use the latin alphabet to render Chinese, Korean and Japanese. So need to use the correct collation, with NChar/Nvarchar and NText data types. Check below for your collations.

http://msdn.microsoft.com/en-us/library/aa176553(SQL.80).aspx

http://msdn.microsoft.com/en-us/library/aa258233(SQL.80).aspx