The spelling of the word "most donein" uses the English language's irregularities in spelling and pronunciation. In IPA phonetic transcription, it is pronounced /moʊst dʌnɪn/. The word "most" follows the regular pronunciation of the long "o" sound, while "donein" uses the silent "e" at the end, causing the vowel "i" to have a short sound. Overall, the spelling reflects the evolution of language and its many influences over time.