I ported all of the Matrix screensavers with Indian language glyphs to KDE4. For details about the screensavers please read:
Download the binary packages: Deb package, and RPM package
There are 6 screensavers in that package, for Malayalam, Hindi, Oriya , Bengali, Tamil and Gujarati. After installation, goto KDE system settings->Desktop->Screensaver and select any of this.
Screenshots(click to get the image in original size):
KDE Screensaver configuration for Hindi: