The word "AUTRAN" is a proper noun that is pronounced as [o'tʁɑ̃]. It has three syllables and starts with the vowel sound [o]. The second syllable contains a consonant cluster [tʁ] which is pronounced with the tip of the tongue touching the alveolar ridge. The final syllable ends with a nasal vowel sound [ɑ̃]. The spelling of this word follows French orthography rules, where the letters "au" make the [o] sound and "an" makes the nasal vowel sound [ɑ̃].