User blog comment:OtterJiang/V4 Ruby - "I Have Some Concerns"/@comment-53539-20150429090340/@comment-53539-20150430071005

While English vocaloid do share many of the problems other languages can share, the language isn't easy, don't forget. I think a lot of it is the tuning. To be honest, until a vocaloid is released, we can never know what we're listening to. :-/