"We're not aware of that university," said Emma Mortimer, communications director of Signature, a charity that awards qualifications in deaf and deaf-blind communication techniques.
Even if he had studied in the United Kingdom, Mortimer said that wouldn't necessarily qualify him to work in South Africa because the country's two sign languages are different.
"It would be like you going to France and speaking English," she said.
Associated Press writers Tendai Musiya and Gerald Imray in Johannesburg, Danica Kirka in London and Jason Straziuso in Nairobi, Kenya, contributed to this report.
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