Wizardry: Proving Grounds of the Mad Overlord, Legacy of Llylgamyn, and The Knight of Diamonds were all released in at the same time. They were almost done as one project. They share the same readme file.
They are translated 100% in English with the exception of the password screen. When viewing the password and typing it in, it remains in Japanese. The author was unable to fix this. If anyone can offer assistance with this, he claimed in 2001 he would add it in.
Hashes:
Wizardry I - Proving Grounds of the Mad Overlord (Japan).gbc
CRC32: A99A33DC
MD5: 6B94C050291C68D6FB13C642C46873AB
SHA-1: ECC073882D09A90FA1F02448C9AE44D43C8B81DC
SHA-256: 00609843F9670AD5D3EE069BF84FEF1D07CF48D1AA6F9255EFE1741257AD5A08
CRC32: A99A33DC
MD5: 6B94C050291C68D6FB13C642C46873AB
SHA-1: ECC073882D09A90FA1F02448C9AE44D43C8B81DC
SHA-256: 00609843F9670AD5D3EE069BF84FEF1D07CF48D1AA6F9255EFE1741257AD5A08
Relevant link: http://www.angelfire.com/goth/patches/index.html
File download: