Pedantry:

Tolkien's "Middle-Earth" is itself a "folksy mistranslation"

Closer translation-- "Middle-Yard"

Old English word eardgeard =Earth-Yard

/ ˈæ͜ɑrdˌjæ͜ɑrd / "ardyard" /

https://www.theundergroundmap.com/article.html?id=104937

https://english.nsms.ox.ac.uk/oecoursepack/wanderer/notes/no...