This is where things can get tricky if you don't speak or understand any Japanese. Luckily, I'm here to help you through this part.
Utauloid English Patch Reviews
Many UTAU users have developed plugins for UTAU, and some are listed below. To install plugins, create a folder labeled plugins and simply extract them there. Lyric Diphonizer by 564. ImportVSQX by Tty. Romaji to Hiragana UST Converter by 遊牧家族. The Best Things I Could Think of, etc. They were originally considered Vocaloids as well because of Teto, the pioneer (if not the first UTAUloid), being attempted to pass off as a real Vocaloid. UTAUloids refer to voice banks that work on Vocal Synthesizer Tool UTAU, with accompanying anime-inspired avatars, just like Crypton's Character Voice Series for VOCALOID. The reason for segregating them is to differentiate them from.
Tada! Now you should have a fully functional version of English UTAU! Just double click the exe file and it should be ready to go!
Utauloid English Patch System
Now, on a side note, I found that if I pulled the UTAU icon out of the folder and tried to launch it, it would run in Japanese. This is because it needs to stay in the folder WITH the translated coding. In order to launch the program in English, you will either need to keep the icon inside the folder, and launch it from there, or you can do what I did and drag the icon down to your dock. (I'm using Windows 7, this may not work for other types) This allows me to have the icon within easy reach at all times, but it still keeps the actual exe file INSIDE of the folder with the translations, therefor allowing the program to run in English.