hmmm!!! i think thats why most of their songs translated into japanese ver. so that the japanese people who also idolized snsd can really understand and so that if they will have a 音乐会 in 日本 they can sing their songs 由 translating it into japanese version.... ahm, i think thats all... ::)))
It's because they are promoting in 日本 as well as Korea now. When 你 promote 音乐 in another country, it's only logical to be 唱歌 it in that country's language. And, they probably redid Gee and Genie because they were so popular.