The spelling of the word "moisan" can be explained using IPA phonetic transcription. The first syllable is pronounced as /mwa/, with a nasalized "w" sound. The second syllable is pronounced as /sɑ̃/, with a nasalized "ah" sound. The final syllable is pronounced as /̃/, with a nasalization of the preceding vowel. This word is of French origin and is not commonly used in English. It is important to ensure correct spelling and pronunciation when using unfamiliar words in communication.