LVS is all kernel code. It's hard enough to write for one kernel. No-one is contemplating porting LVS to any other OS's.
There is a FreeBSD loadbalancer project (HUT)".
There is the LVS-mini-HOWTO in Portuguese translated by Carlos Cherem.
One person offered to translate the HOWTO into Italian a long time ago and I haven't heard from him since. Another person recently (May 2001) offered to translate it into Japanese. From the number of Japanese HOWTO's I find in google searches, I'd say there is a good chance of having a Japanese HOWTO sometime.