When I want to check the Tanakh, I go to jewishvirtuallibrary.org. In the book of Yeshayahu, chapter 14 verse 12 I read “ How art thou fallen from heaven, O Lucifer, son of the morning! how art thou cut down to the ground, which didst weaken the nations!”. It sounds just like my King James! Do you have a better, I mean more accurate, English translation of the Tanakh?
The Jewish Virtual Library uses the 1917 Jewish Publication Society Bible, which borrowed heavily from the Christian English Revised Version and the American Standard Version. They viewed the Tanakh as a mere cultural artifact.
Jewish secularists regard Christianity and Judaism as equally mythological, so aren’t really particular about such things as precise translations.