OK, so a lot of people here have been asking for an "undub" for Breath of the Wild, but they haven't been getting many answers. I was inspired to make this after spending a lot of time and error trying to get this to work (no, FtpiiU Everywhere does not let you rename a folder in a game you've already installed, unfortunately), so to spare others the hassle, here's a guide on how to switch the voices. This will allow you to have a game with the voice talents from any of the game's eight dubs installed on your system, while still having the text and subtitles match the language of your Wii U. You will need: A Wii U capable of running a sigpatched sysNAND or redNAND An SD card with at least 10GB of free space WUPInstaller Y mod CDecrypt 2.0b (optional, if you have JNUSTool) NUSPacker A program to download the game files from Nintendo's servers* (I recommend this one) *Even if you have a physical disc of the game, NUSPacker has issues with DDD dumps, so you'll still have to download from the NUS. Now that you have everything you need, let's begin. 1. First you must download the full game of the Zelda Breath of the Wild version that you want to use as a base (this version must have the subs you want). Open your program to download off the NUS, and make sure you have the Wii U Common Key entered into it. You'll have to find this yourself. Search/scroll to try and find the if it's not on the list you may have to enter the title ID (00050000101c9500 for Eur, 00050000101c9400 for NA, 00050000101C9300 for JP). To do this in JNUSTool GUI Mod, go to download queue and hit the blue plus. Note that with JNUSTool, you can skip step 2 if you do the following. Go to "That Title Keys Site" (you can find this yourself) and find the title ID and the 32 character title key of the version of the game you want to download. Then, in the folder with JNUSTool.jar hold Right Shift, then right click and hit "open command window here" and type in: Code: java -jar jnustool.jar TITLEID TITLEKEY -file /.* This directly decrypts the data while downloading, circumventing the need for CDecrypt. Next, if you want Mexican Spanish in the Euro version or Russian, German, Spanish Spanish or Italian in the NA version, or Japanese in either, you'll also need to download the voice files from that version. So, do much the same as above, find the title ID and 32 char title key of the game you want the voice files from from "That Title Keys Site". Open the CMD in the folder with JNUSTool.jar and type: Code: java -jar JNUSTool.jar TITLEID TITLEKEY -file /content/Voice/.* This will download just the voice files, so it shouldn't take as long as before. 2. If your program gave you .app files and such instead of meta, code and content folders, then you'll need to do this step. Otherwise, you can skip it. So, put CDecrypt along with its two .ddls in the folder the files were downloaded to. Hold Right Shift, then right click and hit "open command window here". Now type in: Code: Cdecrypt title.tmd title.tik You should see a stream of files being listed in the CMD. This will take some time. The CMD will close when it's finished. You should be left with "code", "content" and "meta" folders. Do this for the other version of the game with the voice files you want as well if you downloaded it. 3. Now we do the actual modding. Go into the content folder of your "base" game, then Voice. You'll see a folder for every language the game contains. Take note of the name of the folder that matches the language of your Wii U. This will probably be the one you want to replace. Rename it anything you want. Copy the folder with the language you want from the "Voice" folder of the other version of the game if it's not already there, then give it the old name of the folder you just renamed. Also, while you're here, DO NOT MERGE THE BASE GAME AND UPDATE FILES or WUPinstaller will fail later on. The "code", "content" and "meta" folders should only be 9.79GB or so altogether. 4. Next, put NUSPacker outside the folder that has the three folders. You must make sure that "code", "content" and "meta" are alone and the only items in their folder or NUSPacker will fail. Now, create a .txt file in the same directory as NUSpacker and type in the Wii U Common Key. Again, find it yourself. Rename it "encryptKeyWith" with no file extension. Hold Right Shift, then right click and hit "open command window here". Enter: Code: java -jar NUSPacker.jar -in "Folder with meta, code and content" -out "OUTPUT" Yes, the "" are necessary. Again, the CMD will list a load of files. This will take even longer than CDecrypt. The CMD window will close when it's finished. When this is finished you should be left with a bunch of .app and .h3 files, as well as a .tik, .cert and .tmd. It does not matter if this does not resemble what you downloaded in part 1, as long as it is around 9.79GB. 5. Now, get your SD card you use with your Wii U. Make sure WUPinstaller is in the wiiu/app folder, and then create an "install" folder on the root of your SD card. Make another folder inside "install" and call it "Zelda" ( or whatever you like really). Put the NUSpacked files from part 4 into this folder. 6. Put your SD card into your Wii U. Before you install anything, you must uninstall any digital copy of BotW you already have in Data Management in System Settings. You could backup your save at this point with FtpiiU Everywhere or Saviine, but this turned out to be unnecessary in my case, so it should be fine as long as you leave "saved data" alone in Data Management. Lastly, launch sigpatches through your preferred method and get into the Homebrew Launcher. Load up Wupinstaller Y mod and use the D-pad to select the "Zelda" folder. Press X (or A if you want in on NAND) to install it. If you followed this guide correctly, the install should pass without any errors. Congratulations! Now get out there and explore Hyrule in your language of choice! If you have the game already installed, @speckxz found a way to use FTPiiU Everywhere to replace the files. This is by far the quickest method if you already have the digital version of the game. speckxz's Video Guide Also, @bobrocks95 found a way to use this with a physical disk of the game and SDCaffine, but it involves a fw.img, so it might be a bit more of a hassle. SDCaffine Method I have the Japanese voices running off of my US disc version of the game finally. I'll try to document everything I did. Let me know if I missed a step. FSHax does indeed allow Breath of the Wild to access the SD Card, the problems lie with Mocha + FSHax not working properly. I'm unsure if the problem is Mocha or the person who combined the two doing it improperly, but the point is it doesn't work. For installation/setup: Follow this guide to create a fw.img that you will later modify (This is the hardest step- feel free to ask for help, but check that thread first to see if someone else had the same problem you did) Download the FSHax IPS patch from this thread Download Lunar IPS patcher, available from romhacking.net Patch the fw.img that you generated in step 1 with the fw.ips from step 2 using Lunar Place the fw.img file on the root of your SD card For voice file setup: Follow FlappyFalco's guide up to step 3 (NOTE: you do not need to download your version of the game, just the version you want the voice files from) Create a folder on the root of your SD card named the title ID of your Zelda disc IN ALL CAPS (For US -> 00050000101C9400-------for EU -> 00050000101C9500) Put the folder for whatever voice files you want to use in the folder you just created, renaming the JPja (or whatever language) folder to the language your game is expecting (for US copies, USen) Final file structure for JPN voices on my US copy is root:\00050000101C9400\Voice\USen To run the undub: Run the browser exploit to launch the Homebrew Launcher Run CFWbooter - available from the homebrew app store or this thread Wait for the Wii U to reboot and open the Homebrew Launcher through the browser exploit again (The channel version of HBL I usually use through Mocha does not work) Run SDCafiine - available from the homebrew app store or by compiling it yourself Launch Breath of the Wild and enjoy If you want quick confirmation that the undub is working: Early Game Spoiler Talk to Impa and have her replay the "10,000 years ago" cutscene. I don't know if you'll find this well-written enough to add it to the OP FlappyFalco, but hopefully it helps someone . Hopefully FSHax is ported properly to Mocha and/or Haxchi soon, so this method could be more accessible.