เปลี่ยนภาษา japan menu to english menu

gbatemp.net/threads/convert-japanese-console-language-to-english-method.607164/

You need:
1. A Hacked Wii U, it can run homebrew_launcher apps.
2. FTPiiU_Everywhere apps.
3. Backup USA/EURO Wii U console NAND and extract language file: AllMessage.szs (or download by yourself.)

First:
Backup your Japanese console NAND!!!! And store to the PC. Once brick, you can unbrick by hardmod method or via Tiramisu to recovery.
This tutorial not fully translate all language.

Step:
1. Run FTPiiU_Everywhere apps via homebrew_launcher.
2. PC ftp tool connect to WiiU, I used FileZilla.
3. Browse wiiu folder below path in filezilla, and backup(download) AllMessage.szs file to your PC. (Once bricked, you can via Tiramisu autoboot to recovery.)
/storage_mlc/sys/title/0005001010040000\content\JpJapanese\Message
4. Now you can upload your language file (English/Spanish or other language AllMessage.szs) to below path and overwrite it:
/storage_mlc/sys/title/0005001010040000\content\JpJapanese\Message (WiiU Menu)
/storage_mlc/sys/title/0005001010047000\content\JpJapanese\Message (System Settings)

If you need English Parental Controls and Daily Log, you can download below ID and overwrite below path file, please remember backup existing file first. (I tried in my console, it work.):
/storage_mlc/sys/title/0005001010048000\content\JpJapanese\Message (Parental Controls)
/storage_mlc/sys/title/000500101004C000\content\JpJapanese\Message (Daily Log)

5. Exit FTPiiU_Everywhere to Menu and check the System Setting language.

Warning: If brick your console, it's your choice, USE AT YOUR OWN RISK! Please make sure you had backup your nand and have method to restore it.

This method works in my Euro console and tested in Japanese console for Chinese translate menu.