After some shuffling around of code and some gradient paint-bucket in Photoshop, the translation widget is done. Remember, of course, that you need a Sony Mylo to use it. Unless you just want to download it, unzip it and have a look at the code, that is.
You can also download it from the official widget gallery. I'd be interested to find out how well/badly it functions on a non-Japanese Mylo. I have no idea about the language capabilities of other versions.