Looks like that thread
HI linked is in a serious need of a "sweeping party".
After a little tour in Europe, Gollum had a new mantra: "My invaluable!" Did he learn a new word for preciouss or was there an inflation period?
Also, Saruman was widely known as a good speaker: "When you were it for me wished unnecessarily do not go men slain."
(If you go to war, needlessly, for I did not desire it, then men will be slain.)