Dorateen
Arcane
Sounds like he was concerned about treating language creation as a game rather than serious scholarship. I don't really think you can infer anything about what he would have thought of RPGs from that sentence.Tolkien himself was critical about the "gameification" of his works long before the hobby was birthed
Can you expand on that a bit? Interesting.
I've read a lot of volumes that his son, Christopher, put together posthumously. These included various letters that J.R.R. Tolkien composed. In one, I think when discussing the subject of his invented languages he said something such as: "One must be very careful not to make a sort of game out of the whole thing..."
True, it would be easier to explain if I had the exact passage in front of me. But the idea was that because his language creation is so detailed and fundamentally sound, he was wary of kids running around speaking Sindarin or passing notes written in elvish in the middle of class.
I think Tolkien would have taken a dim view of LARPers.