The spelling of the word "most twoton" is quite straightforward once you understand the pronunciation. In IPA phonetic transcription, it would be written as /məʊst tʊtən/. The "o" in "most" is pronounced as a long "o" sound, while the "t" in "twoton" is a hard "t" sound. The "u" in "twoton" is pronounced as a short "u" sound, like in the word "but". Therefore, the spelling of "most twoton" accurately matches its pronunciation in English.