the sick masochistic lion concerns himself with the opinions of the stupid lamb
seen from China

seen from United States
seen from United States

seen from Germany

seen from Malaysia

seen from Malaysia

seen from United States
seen from United States
seen from United States
seen from United States

seen from Malaysia

seen from United States

seen from United States
seen from Indonesia

seen from Bangladesh

seen from United States

seen from New Zealand
seen from United States

seen from Malaysia

seen from United States
the sick masochistic lion concerns himself with the opinions of the stupid lamb
Uncredited 1964 cover to Poul Anderson's Twilight World
I was thinking about what you shared re the Twilight Realm being the "Shadow World" (影の世界) in Japanese and I have a niche language question if that's ok: my online Japanese dictionary is telling me that kage/影 means both shadow and reflection, whereas in English "shadow" is more closely associated with "dark". So now I'm wondering: is 影の世界 best understood as a dark world or as a mirror world? If that makes sense? Sorry to be a language nerd in your DMs lol
No worries!! It's fun to talk about this stuff so please please ask me more if you have more questions.
I don't know what dictionary you're using - and it probably depends on context too, but from what I'm aware, 「影」 definitely is just shadow. Reflection would be 「反射」, or hansha. I've never heard anyone ever use the word 「影」 to refer to reflection, like, ever? Like, when talking about one's shadow in a casual setting kage is the word we use.
So yeah, in this instance I think it's definitely not a mirror world, and more of a dark world or literally, "Shadow World."
If it were a mirror-world, they'd probably describe it more how they describe Lorule in the Encyclopedia: 「ハイラルの裏側」 (hairaru no uragawa), or "the backside of Hyrule." The word 「裏」 ura here is the same word we'd use to be like "turn your paper to the backside" during a test, or like, the tail-side of a coin. In other words, Lorule and Hyrule are two sides of the same coin, and Lorule is specifically referred to in that kind of manner.
So yeah! Twilight Realm is definitely a Dark World, of sorts, rather than a Mirror World.
Don’t be fooled by love songs and lonely hearts You’re living in a twilight world