You need to download a program that applies translation first. How we do this, is
1. Download AutoTranslator-ReiPatcher-5.2.0.zip (if you google, it should just give you the correct fist link)
2. Unzip it in your night of revenge folder so that SetupReiPatcherAndAutoTranslator.exe would be located in the same folder as "NightofRevenge.exe".
3. Run the SetupReiPatcherAndAutoTranslator.exe, it'll do some stuff. After it's finished, close it. Should take a few seconds.
4. Run "NightofRevenge (Patch and Run)", play the game a little and close it. You'll never need to do this again. You can delete reipatcher and "NightofRevenge (Patch and Run)" afterwards.
5. Then go to NightofRevenge\AutoTranslator\Translation\en\Text, you'll see that you already have _AutoGeneratedTranslations.txt there inside (or at least you should). Open it with notepad or something, copy & paste everything there, from the "_AutoGeneratedTranslations.txt" that you downloaded from this website. I don't recommend simply replacing the files themselves. This gave me some errors. Just replace the text. If the txt file isn't there, then try to just put "_AutoGeneratedTranslations.txt" that you downloaded from this website there