Toposa (also Akara, Kare, Kumi, Taposa, Topotha) is a Nilo-Saharan language (Eastern Sudanic, Nilotic) spoken in South Sudan by the Toposa people.  Mutually intelligible language varieties include Jiye of South Sudan, Nyangatom of Ethiopia, Karimojong, Jie[2] and Dodos of Uganda and Turkana of Kenya. Teso (spoken in both Kenya and Uganda) is lexically more distant. 
  Phonology
 Consonants
  - All consonants (except, of course, for /w/ and /j/) can occur in labialized and palatalized forms.
Vowels
   - Toposa, like many Nilotic languages, has vowel harmony with two sets of vowels: a set with the tongue root advanced (+ATR) and a −ATR set.  +ATR is marked.  The vowel /a/ is neutral with respect to vowel harmony.[3]
- All nine vowels also occur as devoiced, contrasting with their voiced counterparts.  These voiceless vowels occur primarily in prepause contexts.  Some Toposa morphemes consist only of a high voiceless vowel; the functional load appears to be much greater with the high vowels than with the lower.[4]
- Toposa has tone, which is grammatical rather than lexical.  Tone is used to mark case in nouns and tense in verbs.
Bibliography
 - Schröder, Martin C. (1989). "The Toposa Verb in Narrative Structure". Afrikanistische Arbeitspapiere. 20: 129–142.
- Schröder, Martin C.; Helga Schröder (1987a). "Voiceless Vowels in Toposa". Afrikanistische Arbeitspapiere. 12: 17–26.
- Schröder, Martin C.; Helga Schröder (1987b). "Vowel Harmony in Toposa". Afrikanistische Arbeitspapiere. 12: 27–36.
References
   - ^ Toposa at Ethnologue (25th ed., 2022)   
- ^ Jiye and Jie are the same name, but refer to different varieties 
- ^ Schröder & Schröder 1987b, p. 27 
- ^ Schröder & Schröder 1987a, p. 17 
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