Hiya there,
When non-English TV shows have official episode titles in their own language, we don't force English translations instead. Please don't rename back to English episodes for "My Demon". You can see episode titles on their official site, but what's more, it is in the each individual episode as well.
Here is a screenshot I captured for episode 6 to have as proof: https://www.tvmaze.com/images/1220751/je6hoe-sulebakwi-sog-eulo-image-1220751
Sometimes Korean episodes (well almost always) have episodes in Korean, but for those that have more than just "Episode 1", the title should be as is.
Another example: https://www.tvmaze.com/images/1180717/chapter-3-gongbeom-image-1180717
Same thing for Japanese shows, like below:
- https://www.tvmaze.com/shows/5429/meitantei-conan/episodes
- https://www.tvmaze.com/shows/495/naruto/episodes
Each episode has clear title in Japanese, and not as some subtitle. Since Japanese TV station is original airing, then episode titles there are used. I think the policy is where it originally airs is what we use for primary title.
Kind regards,
MAT