Which begs the question… Should they spend money on localising their website?
These guys did… “ While we're on the subject of international adventures, it should be noted that Twitter has officially launched in Japan. We noticed a significant percent of Twitter usage consistently originating from Japan despite the fact that our service is in English . This highlighted an opportunity for us to make Twitter better so we worked with our partner in Japan, Digital Garage to launch a Japanese version of Twitter”. Biz Stone