Yes it is. The original LPC language and interpreters were written by Lars Pensjo. Various derivatives occured and were used for such things as web servers, chat servers. Since they were all derivatives and based on the non-commercial license, Frank Hubinette created a new one from scratch called uLPC which eventually morphed into the scripting language . Many things can be written in this, I have seen: media players, games, etc... It is currently what I am writing my codebase in.

As to LPC similarities to C, I would say it shares alot in common.. from what I know, which is little as I have never really USED C\C++ for much more than simple tasks like writing modules for Pike.