The sounds of Choctaw have been described most extensively in Charles Ulrich's 1986 Ph.D. dissertation (see also Broadwell 2006).
Vowels in Choctaw may be short or long.
|ʋ /a/||a /a:/|
|i /i/||e /i:/|
|u /o/||o /o:/|
In Byington's time, the letter e /i:/ was pronounced as in they.
Vowels are also sometimes nasal, spelled with an underline in the traditional Choctaw spelling.
|a̱ /ã/||i̱ /ĩ/||o̱, u̱ /õ/|
There are thirteen consonants.
|hl, lh /ɬ/|
The voiceless lateral fricative is spelled hl before a vowel and lh before a consonant.
Broadwell, George A. 2006. A Choctaw Reference Grammar. Lincoln: University of Nebraska Press.
Ulrich, Charles H. 1986. Choctaw morphophonology. UCLA Ph.D. dissertation.