I'm just going to put this out there if anyone is planning on ripping sprites from those Japanese doujin games with the sprite ripper. If the name of the .PLAYER file consists of Japanese symbols, then the 2dk2nd sprite ripper cannot rip them unless you change the language of non-Unicode programs to Japanese. Then it should be able to rip the sprites with absolutely no problems. If the name of the files consist of a different language, then you can probably experiment to see which language they are.
EDIT: The most common ones are Japanese, Chinese - Traditional, Chinese - Simplified, and Korean.
EDIT: The most common ones are Japanese, Chinese - Traditional, Chinese - Simplified, and Korean.