If you ever went to a Linux fair or a KDE user meeting in your own country, you probably know that there is real demand for information on KDE in people's own language. Strangely, this area is often neglected, though. So far, very few teams have up-to-date translations of the KDE web site or real informative KDE user sites of their own.
To bridge this gap you can use UserBase. KDE UserBase is a Wiki. You can translate English pages or create pages which will be interesting for users in your own language.
You can also consider to translate technical information from KDE TechBase.