he sign language interpreter widely ridiculed for his performance at the Nelson Mandela memorial stands by his work.
Thamsanqa Jantjie said Thursday that he is a fully qualified interpreter and has been trusted in the past with other big events.
"It has been many years I have been doing this job" he told CNN. "My portfolio shows that I have been a champion of what I have been doing."
Not so, says the head of the South Africa Translators' Institute.
There were complaints last year after Jantjie interpreted the proceedings at the ruling African National Congress elective conference, the institute's chairman, Johan Blaauw, told the South African Press Association.
But Jantjie stands by his work. "I have never in my life had anything that said I have interpreted wrong," he said.
"For the deaf association, if they think that I have done a wrong interpretation, I ask forgiveness. For Deaf SA, if they are telling me that I was doing a wrong interpretation, then they should answer me why they were silent all the time, all these years," he said, referring to the Deaf Federation of South Africa, which has criticized his work at the service.
Jantjie declined to provide details about his hire for the four-hour memorial, watched by millions around the world, as a government inquiry looks into the matter.
He said he had been drawn to the job of interpreting because he was disabled.
"I am suffering from schizophrenia, which is controllable. I am under treatment," Jantjie said.
At a news conference Thursday, Hendrietta Bogopane-Zulu, South Africa's deputy minister of women, children and people with disabilities, admitted that mistakes had happened at the memorial service but added that Jantjie was not a "fake."
She said there was no sign language standard in South Africa and deaf people spoke different dialects.
She added that the government was looking into the vetting of Jantjie's security clearance at the memorial.
"But normally when you do provide a service at a particular level, you will be vetted. And as you could see, he had his accreditation, so he didn't just walk through," she said.