Wizardry Gaiden II: Kodai Koutei no Noroi English translation
ウィザードリィ外伝II 古代皇帝の呪い · Wizardry Gaiden II: Curse of the Ancient Emperor
MrRichard999 and Tangyi_Chang's English translation of the second Game Boy Wizardry side story.
What's translated
This patch makes the second Wizardry Gaiden fully playable in English: the game's text is translated so you can build a party, explore the dungeons and follow what happens without reading Japanese. Version 1.1 came out in July 2016.
Credits
The translation was released by MrRichard999 and Tangyi_Chang.
Playing it
The patch is applied to your own copy of the Japanese Game Boy game, following the instructions in its readme. The patch's database page linked here has the details.