what did they say? >> reporter: well, they admitted there were mistakes but refused to say he was a fake, essentially saying the reason for all of this confusion is that the interpreter was speaking in a different dialect, however, this minister in the cabinet did say that they were trying to investigate the security vetting procedures, and they had tracked the company from which they had hired him, however, the minister, the deputy minister did say that the people who worked for this company had vanished into thin here and that's a direct quote. >> i mean, we've heard from people in the south african deaf community who said that this wasn't just a different dialect, that even the words, the names of, you know, nelson mandela or oliver tambo, he didn't know, he didn't use facial expressions. the government says the company has been providing substandard services for years.