A survey of just three states found 150 sign languages, though this number included instances of home sign.
Government figures estimate there are at least about 48,900 deaf people in Sudan.
[1] By 2009, the Sudanese National Union of the Deaf had worked out a Unified Sudanese Sign Language, but it had not yet been widely disseminated.
^b Denotes the number (if known) of languages within the family.
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