It's not the same word mate. They're literally different words in different languages. It's not a misspelling. Colour and color are literally the same word, d

It's not the same word mate. They're literally different words in different languages. It's not a misspelling. Colour and color are literally the same word, different spellings. Tapu and taboo is not literally the same. They may have derived from the same thing but they are now, different words with different meanings. Suggesting tapu is a misspelling of taboo is like suggesting "Koran" is a misspelling of the word "Bible".