LG's terms of service essentially state that they will record any voice commands and store them for 6 months. They explicitly say they may store them in Korea. https://us.lgappstv.com/main/terms
Actually I think everything you're suggesting is unclear, LG explicitly say they do these things in their ToS. I skimmed their privacy policy, and I'm pretty sure it essentially says they collect all this information and use it for targeted advertising.