Why does the Book of Mormon plagiarize the Old Oxford edition of the King James Version Bible?

In 2 Nephi 15:20 it quotes Isaiah 5:20 but it uses the term "Wo"spelled without the e.This style is unique to the old Oxford edition of the King James Version.Did Ancient America have the old Oxford text?Or might this have been plagiarism?
Update: The original King James Version spells "Woe"with the e.
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