Greetings from a noob!

I have just setup an wordpress blog managed by 1&1 and encountered a very basic problem which unfortunately I have been unable to resolve. The link for posts created are in Korean which appear normally on the blog but as I copy-paste the link, the korean part of the link mutates to something else.

For instance: http://artplatform.info/레슨-제로 becomes http://artplatform.info/%EB%A0%88%EC%8A%A8-%EC%A0%9C%EB%A1%9C

Could anyone help me locate the source of this problem? I have disabled most plugins as well but to no avail.

Thank you!