The spelling of the word "PAPU" is quite literal in terms of its pronunciation, as it follows the rules of the International Phonetic Alphabet (IPA). The two syllables of "PAPU" are each pronounced as "pæ" with a slight stress on the first syllable. The "u" at the end of the word is pronounced as an "oo" sound as in the word "soon". Therefore, the spelling of "PAPU" accurately reflects its phonetic pronunciation.