Hi JP, I'm trying to understand some things about it myself. The translation search engine is free and it has online lessons. One website said one reason they do this is the good advertising they get. The servers they sell are $750,000 and up if I remember correctly. They'll answer any questions a person might have. The LingoDex function of LingoTek sounds interesting. I haven't tried to figure out more about it in quite some time.
Best wishes, Larry