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.