That was Swedish.
Missy x.
Vocaloids are actually Japanese vocal synthesizers. This variant is by a star named Hatsune Miku who is very big in japan.
Here are some others:
http

/www.youtube.com/watch?v=OLzOrik5YJ8
http

/www.youtube.com/watch?v=J8SYrzDHD74
and here is a page on Vocaloid:
http

/en.wikipedia.org/wiki/Vocaloid
The song you posted was probably swedish made using the Vocaloid program, but vocaloids are Japanese in origin.
In terms of music from other nationalities that I like, Im a massive Japan nut. Anything by MUCC, Dir en grey, X-Japan and D'espairsray.