I uploaded Jeju island map in English PDF file
download Download “Jeju map English PDF file” JEJU_MAP_ENGLISH-2020.pdf – Downloaded 4957 times – 3.72 MB
This PDF file from Jeju Tourism Organization Enlgish website.
You can also download from https://www.visitjeju.net/en/tourInfo/guide?tap=two&menuId=DOM_000001810005000000#